maths

posted by .

Factorize 125+8x^3+90xy-27y^3
I tried till :
5^3+(2x)^3-9y(10x+3y^2)

got stuck here as there is no commom cuming 5 and 2x n last sction.

  • maths -

    I see a lot of perfect cubes there

    8x^3 - 27y^3 = (2x-3y)(4x^2+6xy+9y^2)
    Hmmm. No joy there.

    wolframalpha.com factors it, but I can see no motivation for trying (2x-3y+5) as a factor.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. how about his one

    -7+ 5x = 10x-2? im not sure I know its -1, but im not sure how. -7 + 5x = 10x - 2 Since we need to get the unknowns on one side and the knowns on the other side and change their signs: 5x - 10x = 7 - 2 -5x = 5 x = -1 wait how did you
  2. maths

    Factorize: 1.) 64x^3-y^3 2.) x^4+10x^3+35x^2+50x+24 3.) x^3/8-64-3x^2+24x
  3. Math

    How do you graph the quadratic formula x^2-10x=11?
  4. Algebra I

    Thanks Reiny, but I'm still lost. I understand how you multipled by 10X on the right to get 17x, but you went too fast on the left, and I have no idea how you got 10x^2-20 from the starting left side. Can you show each step?
  5. math percents

    Can you check these? 18% of 90 is what number?
  6. Math mrs sue

    Can you check these? 18% of 90 is what number?
  7. powers of exponents math

    simplify each expression: can you check and help me please a) 3*3*3 i got: 27 b) (-2)(-2) i got: 4 c) (-125)(-125)(-125) i got: -1953125. d) -(2)(2)(2) i don't know: e) (-1) (-1) i got : 1 f) -4*4 i don't know:
  8. Calculus

    Find d^2y/dx^2 in terms of x and y given that 8x + 6y^2 = 8. Use the original equation to simplify your answer. A. y'' = -(4/9y^3) B. y'' = -9y^3 C. y'' = -4y^3 D. y'' = -27y^3 E. y'' = -(8/27y^3)
  9. maths

    Find the normal to the curve x=tt+1x=tt+1 and y=tt−1y=tt−1 at the point T where t = 2. I tried converting this into one equation (y=x(t+1)t−1y=x(t+1)t−1) but don't see how to get the answer which says: dydx=−(t+1)2(t−1)2dydx=−(t+1)2(t−1)2 …
  10. Maths

    Factorize: ab2(Square)-ac2 (square),hence show that 10x(5.5)-10 (4.5)2 (square)=100

More Similar Questions