Question

Please help: Solve: 4x^2 + 8x - 5 = 0

Answer 1

@mariah95 Here you go

Answer 2

okay got you give me a sec..

Answer 3

why did put a ^ thing

Answer 4

To say it was a square.

Answer 5

oh okay

Answer 6

Complete the square method.
1. Divide thru by 4: x^2 +2x -5/4 = 0
2. Add 5/4 to both sides getting: x^2 + 2x = 5/4
3. Take 1/2 of the x coefficient and square it adding it to both sides. Getting:
x^2 + 2x + 1 = 5/4 + 1
Simplify: (x + 1)^2 = 9/4
Take square root of both sides: x + 1 = =/- 3/2
solve for x, x + 1 = -3/2 x=-1 - 3/2 = -5/2 (1st root)
x + 1 = 3/2
x=-1 + 3/2
x= 1/2 2nd root

Answer 7

Sir how would that be if u solved it as a Quadratic

Answer 8

Should get the same two roots. I just liked that way better. Does the problem require you to use quadratic? If it does, please do so.

Answer 9

I Believe i can do it that way but my teachers have not taught it to use that way