Monday

March 2, 2015

March 2, 2015

Posted by **Robert** on Tuesday, November 20, 2012 at 11:37am.

Use the quadratic formula to solve the equation. x2 – 7x – 6 = 0

Simplify the expression. (–2i)(8i)

What are the solutions?

1/2x^2 + 2x + 3 =0

I need help

- Algebra 2 help!!! -
**mathfailure**, Tuesday, November 20, 2012 at 11:45amfor number one we see that this could be of the form (x+7)^2 so we expand to get x^2+14x+49 so we need to add 49

for number 2 we can just use the easy way (factoring) although you can use the quad formula. (x-1)(x-6) to get x=1,6

we multiply coefficients pretending i is a variable. so we get -16 i^2. we know i is the square root of -1 so i^2 = -1. Thus -16 i^2 = 16.

for the last one, multiply both sides by 2x^2 to get 1+2x^3+6x^2. Then we can let y=x^2. Thus we get 1+2y^2+6y and we rearrange terms to get 2y^2+6y+1.

through the quadratic formula etc. we get a complicated non-real answer: x= (-4+2i\sqrt2)/2, (-4-2i\sqrt2)/2

**Answer this Question**

**Related Questions**

math - is these answers correct? solve the equation: 2x^2 +8x - 17=(x +2)^2= x=-...

math - (4.35E-2 - x)(7.56E-2 -x ) ============================ (0.324 + 2x)2 ...

math - (a) Complete the square by writing in the form . Note: the numbers and ...

Algebra - I was given this answers to a problems I solved but I do not ...

Algebra - I was given this answers to a problems I solved but I do not ...

math/algebra - f(x)=-x^2+2 the maximum y-value is y...

math,algebra - can someone help me out factor out this 0=16t^2-122t+180 i have ...

Algebra 1 - Use the quadratic formula to find the x value that will solve the ...

Algebra II - 1)What method(s) would you choose to solve the equation: x2 + 2x - ...

Math - Use the quadratic formula to solve each of the following quadratic ...