# (6x-2y)/(x^2+xy-2y^2)-(3x+2y)/(x^2+3xy-4y^2)

178 results

### Simultaneous equation

X+y+z=1......(1) x^2+y^2+z^2=35........(2) x^3+y^3+z^3=97.........(3) solution but from 3 (x^3+y^3)=(x+y)^3-3xy(x+y)......(4) puting 4 into 3 bck (x+y)^3-3xy(x+y)+z^3=97.......(5) now from 1 x+y=1-z......(6) putin 6 into 7 we have (1-z)^3-3xy(1-z)+z^3=97 [1-2z+z^2](1-z)-3xy(1-...

### Derive

Find the derivative of sin(2x + 3y)= 3xy + 5y-2. I have this so far 1) cos(2x+3y) * d/dx (2x+3y)= 3xy' + 3y + 5y' 2) cos (2x+3y) * [2 + 3y']= 3xy' + 3y + 5y' 3) 3y' cos (2x+3y) + 2cos(2x+3y)= 3xy' + 3y + 5y' 4) 3xy' + 5y' - (3y(cos(3x+3y)= 2 cos (2x + 3y) - 3y If I am wrong, ...

### polynomials

I have to simplify (-x^5y^4)^4(3x^2y)^2(1/3xy) I did (x^20y^16)(9x^4y^2)(1/3xy) (9x^24y^18)(1/3xy) 3x^25y^19 Is this correct? Thank you for your help!

Posted by Jessie on Monday, October 18, 2010 at 3:48pm. I think I figured it out-please check I'm really stuck on these problems- Simplify 6xy(3xy)^-2? I think this is 2/3xy choices were 2/xy 3xy 2xy 2/3xy Simplify 12xyz^-2/8x^-2z choices were 3x^2y/2z^3 3x^3y/z^3 3x^3y/2z^3 x...

Posted by Jessie on Monday, October 18, 2010 at 3:48pm. I think I figured it out-please check I'm really stuck on these problems- Simplify 6xy(3xy)^-2? I think this is 2/3xy choices were 2/xy 3xy 2xy 2/3xy Simplify 12xyz^-2/8x^-2z choices were 3x^2y/2z^3 3x^3y/z^3 3x^3y/2z^3 x...

### Math help polynomial

multiply the following polynomial -3x(y^2+2y^2) answer choices 3xy^2-6xy^2' -3xy^2-gxy^2 -3xy^2+5y^2 -9xy^2 The last one was the answer. Can you tell me how the answer was solved? Thanks!

### bobpursly,

Is this correct now after i revised it Multiply. 3xy^2(5xy-4x+6y) 3xy^2(5xy)=15x^2y^3 3xy^2(-4x)=-12x^2y^2 3xy^2(6y)=18xy^3 so i get from this 15x^2y^3-12x^2y^2+18xy^3 correct awsome i just thought that the 15x^2y^3-12x^2y^2 should be combine...

### Math!

1) What is the value of 19 + 5a^4 + 3b^2 when a = 2 and b = -4? (this is not a multiple choice question) but my answer is 147. 2)Combine the like terms to simplify the expression: 4 + 7xy^2 + 5y^3 + 10x -4xy^2 - 8x - 4y^3 + 9 - y^6 + 3x^2y^2 + 10x + 13 - y^3 + 3xy^2 + 2x + 13...

### Math

I have no clue how to do this as no values were given and im confused. can someone explain plz? if x^3-y^3=m and x-y=N, express xy in terms of M and N This is one of those pure manipulation problems. you have to know that x^3-y^3 = (x-y)(x^2+xy+y^2) so n(x^2+xy+y^2)=m (x^2+xy+...

### differential equations

the directions are to determine whether or not the equation is exact if so then solve it. the question is (x-y^3+ysinx)dx = (3xy^2+2ycosx)dy i solve and i got that it is exact because My is -3y^2+2ysinx and Nx is -3y^2+2ysinx since m and n are equal then they are exact then i ...

### Algebra

Are these complete? m^2 + 4mn +4n^2 = (m + 2n)(m+2n) 3x^3y^2 – 3x^2y^2 + 3xy^2 = 3xy(x^2y – xy + y) Thank you

### algebra 2

(w + 2t)(w^2 - 2wt + 4t^2) (x + y)(x^2 -3xy + 2y^2) =x^3 - 3x^2y + 2xy^2 + x^2y -3xy^2 + 2y^3 = x^3-2x^2y-xy^2+2y^3

### Math

How do you factor: 9x^2y^3 - 3x^3y^2 - 15xy i got: 3xy(3xy^2 - x^2y - 5) But how do you factor it further to simplify it? Thx

### algebra

Simplify. Do not use negative exponents in the answer. 12x-2y4 -3xy-7 There should be a line between like a fraction but it did not copy or paste. This is the answer I got 12 x^-2 y^4 = 12y^4/x^2 -3xy^-7 = -3x/y^7 it was wrong. 12x^-2y^4 / -3xy^-7 = 12/-3 * x^-2 / x * y^4/y^-7...

### Math

factorize the following using. formula #1 : (x+y)^3 = x^3+3x^2y+3xy^2+y^2 formula #2 : (x-y)^3 = x^3-3x^2y+3xy^2-y^2 Problem #1 : 8a^3+60a^2+150a+125 Problem #2 : 27x^3-27x^2y+9xy^2-y^3 please tell me how to solve them

### Algebra

–2x(–3x ^2y)(2y) = ? A. 12x^3y^2 B. –3xy^2 C. 3xy^2 D. –12x^3y^2

### Algebra - Equations

If 3xy = 9xz = 12yz = 1, what is the value of x, y, and z? This is just a set of 3 equations: 3xy=1 9xz=1 12yz=1 ⇒(18xyz)^2=1 ⇒ xyz = ± 1/18 ⇒ (x,y,z) = ±(2/3,1/2,1/6) PLEASE TELL ME HOW DID THE SOLUTION CAME UP WITH xyz = ± 1/18 and (x,y,z) = ±(2/3,1/2,1...

### math,algebra,help

Okay now i need explanation how to do these types of problems. Directions: Divide Problem: (7x^5y^5-21x^4y^4+14x^3y^3)/(7x^3y^3) Realize that you have 7x^3y^3 on the bottom. Now in order to get rid of that, you want to have the same thing in the top, multiplied by something ...

### Calculus

Let 5x^2 - 3xy + 58 = 2y^3 Use implicit differentiation to find y' for the above equation. The first thing I did was move 2y^3 over to that everything is equal to 0. With the -3xy I used the product rule and expanded that. After solving I got.... 10x(3 * y + 3x * 1dy/dx)- 6y^...

### Algebra

I'm having trouble working out these problems. Could someone please assist? with this first one do I factor the x^2 + 3xy - 18y^2 first? x - 3y * x^2 + xy - 30y^2 / x^2 + 3xy - 18y^2 3a^3b^2 * 4a^2 + 2ab + b^2 8a^3 - b^3 12ab^4 3y + 12 / 9y+36 8y^3 16y^3 Susan I see these are ...

(3xy-10)-(xy+5)

### algebra

(6x-2y)/(x^2+xy-2y^2)-(3x+2y)/(x^2+3xy-4y^2)

3y^2-6x^2-3xy=0

### algebra

x^2+2y^2-3xy for x=2 and y=3

### algebra

x^2+2y^2-3xy for x=2 and y=3

### Math

(-3xy^2)^2(-2x^5y^3)^3

### Math

3xy - | x- 2 | when x = -1.3, y = 2/5

### Algebra

If x^2y^2+x^3y^4=(3xy)^2,then xy^2= a. 1.5 b.4 c.8 d.16 e.64

### Math

(3xy-5ysquare)(-4x)

### algebra

2x-3xy ________ 2x y

(2x^5y3)^4*3xy^2

(2x^5y3)^4*3xy^2

### math

evaluate 5x^2+3xy-y^2 when x=3 and y=-3

### cleveland

1/ 3xy^3 - 8/ 15x^2y

### MATH

3xy-ysquare=2 and 2x -3y=-4

### math with cal

f(xy)= x^2e^3xy find fx fy (1,-1) fy (3,-3)

2y^2*3xy^3 divided by 3x^2y^4

### Geometry

midpoint of L. 1/3XY = 3. What is the midpiont of XY?

### maths

how do I solve 3xy^3dy/dx=y^2x^2+5x^3y+y^4

### calculus

How do I solve 3xy^3dy/dx=y^2x^2+5x^3y+y^4

12x^2y-6xy^2/3xy

### math

simplify this expression (3xy)^2(2x^2z)^3

### Math

If x=4 and y=-1,find the value of 3xy

### Math

Simplify: (1/5x^4+1/3xy^2+1/2y^2)+(6/5x^2y^2+2xy^2+11/6y^2)

### Math

Interval it exists on: (5-x)y"+3xy'-y=1 y(0)=2

### math

Solution of the equation 4/x-5/y=x+y/xy+3/10 and 3xy=10(y-x)

### maths

x2-3xy+y2+1=0, 3x2-xy+3y2=13

### Math

Help. solve simultaneously x^2+y^2=13 and x^2-3xy+2y^2=25

### calc

derivative of y=sqrt2x-3xy+2

### college math

can you help me factor 3xy@+9xy+6x=

### Calc

The curve 3y^2- 3xy +2x^3 = 7 has vertical tangents when: a. y=x b. y=2x c. 2y=x d. y=3x e. 3y=x

### MATH

THE LINE Y=X+4 INTERSECTS THE CURVE 2X^2 + 3XY - Y^2 + 1 = 0

### MATH

THE LINE Y=X+4 INTERSECTS THE CURVE 2X^2 + 3XY - Y^2 + 1 = 0

### Calculus

what is the curve given by the equation x^3=3xy^2+y^3=1 what is dy/dx?

### calculus

find implicit derivative of 2y^2 - x^2 = 3xy + 5

### Algebra

Simplify the rational expression (x^2+xy-2y^2)/(x^2+3xy+2y^2)

### Algebra 2

Simplify the rational expression (x^2+xy-2y^2)/(x^2+3xy+2y^2)

### math

if x,y are integral solution of 2x^2-3xy-2y^2=7 then value of |x+y| is:

### Calculus i need help

Find dy/dx if x^2.y+sin(xy)+y^4.x^2+3xy=5???

### cal

find dy/dx implicitly, given x^3+y^3=3xy

### calc

Is there an easy explanation of implicit differentiation? Where do I start to solve y" given 1) x+xy=y=2 2) x^3-3xy+y^3 Please help!! http://www.math.ucdavis.edu/~kouba/CalcOneDIRECTORY/implicitdiffdirectory/ImplicitDiff.html Take the first one (read the examples in the link ...

### algebra

perform and simplify sqrt 12x^3 . 3xy^2

### Algebra

can you please help me with a math problem? -3xy^2 + 3x2y -2y^3 = xy + 2

### differential calculus

find the implicit function of x^3+3^y=3xy

### algebra

what is the value of the expression 2xsquare+3xy-4ysquare when x=2 and y =4?

### math

How many ordered pairs of integers solutions (x,y) are there to 2x^2+3xy+y^2+2x+y+18=0?

### Math

If x=2and y=-3what is the value of 2x-3xy-2y2

### Math

Evaluate the expression for the given value. x = -2; y = 3; z = -1 -2x^2y - 3xy^2z - xz =

### Math

Need help with solve the system of equations x^3-y^2=7.75. And 3xy+y=3.5

### mathematics

Solve the differential equation x^2dy+ (x-3xy + 1)=0

### Math

Diffrentiate implicitly with respect to x. Solve for y' 3xy - 2x^2 + 5y^2 =7

### Vectors

why does this equation 3xy +y = 0 represent two planes?

### math

x-2/3x+1,determine the inverse. x= y-2/3y+1 x (3y+1)=y-2 3xy+x=y-2 (where do i go from here if i am going right)

### calculus

what is the equation of the tangent line to the curve x^3 + 2y^2 + 3xy = 6 at the point (1,1)?

### algebra

add if possible simplify the expression (8x^3y^2+5x^2y^2+6xy^2)+(4x^3y^2-3xy^2)

### precalculus

ROtate the conic so that its equation 3xy-4y²+ 18=0 has no xy term

### Elementary algebra multiple choice

2x^2+3xy-4y^2= (A) 9x^2-4y^2 (B)9x^2+4y^2 (C)9x^2+4y^2-6xy (D)9x^2+4y^2-12xy

### Find the GCF of the monomials

3xy, 6xz, and 9yxz is  ___________________________

### Math

Find the general solution F(x,y)=C of the differential equation: (-3(x^2)y-8x)dy+(-3xy^2-8y)dx=0 Where F(x,y)=___________________

### College Algebra

What is the leading coefficient and degree in these two problems? 1). 4x^3y - 3xy^2 + x^2y^3 2). -x^5y + 2x^2y^2 + xy^4

### Algebra

Factor x^2 - 3xy - 18y^2 I am not too sure if this is right, but any help is appreciated! Thanks! (x – 6y) (x + 3y) is this correct?

### algebra

6x^2y^3(3xy^^2 ______________ xy^2 Perform the operation and answer in simplified form.

### CALCULUS

Find the relative extrema of function. f(x,y)=x2+3xy+y2-10x-20y+12

### Calculus

Find the equation of the tangent line to the curve x^(3)+3xy+y^(3)=1 at the point (1,0).

### Algebra 1

2x(3xy + 4y² + 8y) 6x²2xy + 2x4y² + 2x8y 12x² + 10y²

### Mathematics

Differentiate the following implicit dunction and find dy/dx ln (3xy)=2xy^2

### MATH

Simplify: 3xy + 6x^2 4xy - 2y^2 ___________ ____________ * then 2y 9x^2 y^2 / (divide by) 4x^2 - y^2 Thank you so much!! :)))

### Math

I'm struggling with factoring these two questions. 36x^4 - 3x^3 - 18x^2 9x^2 + 3xy - 2y^2

### Algebra

(1/8xy - 3/5x³y² + 4.3y³) + (-1/3xy - 3/4x³y² - 2.9y³) What is the correct answer? Thank you! :-)

### Algebra 1

Simplify. Do not use negative exponents in the answer. 12x-2y4 -3xy-7

### algebra

6x^2y^3(3xy^2)^2/xy^2 I need it answered in simplified form with showing the work how u got the answer

### algebra

perform the indicated operation and give the answer in simplified form. 6x^2y^3(3xy^2)^2 _________________ xy^2

### Calc

how do you find which points a tangent line is horizontal/vertical for decartes folium x^3+y^3=3xy?

1. 1
2. 2