Posted by **Marie** on Friday, March 9, 2012 at 12:45pm.

Solve by completing the square,

8x^2+4x-4=0

- Math -
**Reiny**, Friday, March 9, 2012 at 12:52pm
divide by 8 and re-arrange

x^2 + (1/2)x = 1/2

x^2 + (1/2)x + 1/16 = 1/2 + 1/16

(x + 1/4)^2 = 9/16

x + 1/4 = ± 3/4

x = -1/4 ± 3/4

= 1/2 or -1

- Math -
**Ann**, Friday, March 9, 2012 at 2:12pm
Reiny,

Im sorry but where is the 1/16 coming from?

- Math -
**Reiny**, Friday, March 9, 2012 at 2:23pm
take half of the middle coefficient , the square it

1/2 of 1/2 is 1/4

1/4 squared is 1/16

I added that to both sides, thus not changing the value of my equation.

## Answer this Question

## Related Questions

- Algebra 2 - Solve by completing the square. aČ - 2√(3a) + 2 = 0 Solve for ...
- Algebra - Which of the following statements is true? A. Any quadratic equation ...
- math,correction - Is this correct now. Problem #1 solve by completing the square...
- maths - Consider the equation x(square) + 4px + 2q = 0 where p and q are real ...
- Math - Hi everyone. Would someone be able to help me with this problems? I know ...
- Algebra 2 - Completing the square method allows you to solve any quadratic ...
- math - 1. solve by using the quadratic formula. 5x^2+x=3 2. solve by completing ...
- math - i need to solve this equation by completing the square: x^2-14x+1=0 i don...
- math 10 - by completing the square method solve the equation. x^2-2x-1 can u ...
- Math - Solve the equation by factoring, by finding square roots, or by ...

More Related Questions