Question

Factor the trinomial completely. 20x^2-7x-6

Answer 1

(5x+2)(4x-3)

Answer 2

I can't really explain how. It was guess and check.

Answer 3

thank you :)

Answer 4

I see that this is second same question :)
I'll help you make it clear, so you can easily do any of them by yourself :)

You can ALWAYS use formula!
http://en.wikipedia.org/wiki/Quadratic_equation

For x1 you will get 3/4, and for x2 you will get -2/5
So you have:
1) x=3/4
ALL you do is -> x-3/4=0
2) x=-2/5
ALL you do is -> x+2/5=0

So result you want is (x-3/4)*(x+2/5)

Clear enough? :)
Hope I helped! Good luck

Answer 5

or (20x+8)(x-15/20)

Answer 6

I started with 2 products of the first term (5 and 4). Then I chose 2 products of the last term (2 and 3)

I set it up like this (5x 3)(4x 2) I knew i needed the sum to be -7 so the only way that would work is 15-8. So I flipped it to (5x 2)(4x 3) then I filled in the signs

Answer 7

Thank you @nickersia

Answer 8

thank you @masterxnonos

Answer 9

I like the quadratic formula tho. Their answer matched mine if you just get rid of the fractions. I'd stick to that. easy