Question

What is the solution set of 4x^2 + 8x - 5 = 0?

Answer 1

usa test prep?

Answer 2

Algebra Final Review.

Answer 3

oh yeah i saw that problem while working yesterday, let me see if i remember

Answer 4

http://openstudy.com/updates/4fa993c0e4b059b524f57fbd

Answer 5

:) there ya go

Answer 6

use it as a guide

Answer 7

OK, let's see what I get...

Answer 8

Wait, I don't really see anything I can factor out... Hmm...

Answer 9

oh i see, you can use the quadratic formula

Answer 10

Oh, OK. I'll try that.

Answer 11

that should give you 1/2 i believe

Answer 12

You're right!

Answer 13

:) glad i can help

Answer 14

But wait, there might be a second answer.

Answer 15

Hence "solution set".

Answer 16

did you get 1/2?

Answer 17

Yes, one of the answers is 1/2. I tested it out and it works.

Answer 18

oh yeah and the 2nd answer is 5/2

Answer 19

if you're wondering how i got it heres the work!
4x^2+8x-5=0

=> 4x^2 - 2x + 10x -5 = 0

=> 2x(2x - 1 ) + 5(2x-1) = 0

=> (2x-1)(2x+5) = 0

=> x = 1/2 ; x = -5/2 Ans

Answer 20

So the answers are 1/2 and -5/2? OK, got it. Thanks!

Answer 21

no problem