Question

Will give medal
15=8x^2-14x
Solve by factoring

Answer 1

8x^2 - 14x - 15 = 0

factors of 8 would be 4 * 2 OR 8 * 1

factors of -15 are -3 * 5 or 3 * -5 or -15 * 1 or 15 * -1

we have to combine one of the first set to one of the second to get a result of -14 when they are added

Answer 2

this one is tricky

Answer 3

Still confuzzled, but I found a different way to do it and the answers are multiple choice and it's one of them, so I'm gonna go with it.

Answer 4

its -5 and 4 with the 3 and the 2

Answer 5

-20 + 6 = -14

Answer 6

(2x - 5 )(4x + 3) = 0

Answer 7

The answers I got were -3/4 and 5/2

Answer 8

yes thats correct

Answer 9

K then

Answer 10

when you have coefficients that have a few different factors these are tricky

Answer 11

which wat did you do it ?

Answer 12

there is one method called the ac method where you multiply the first coefficient by theb last and then check the factors

here ac = 8 * -15 = -120

Answer 13

i prefer just to play around with the factors

Answer 14

15 = 8x^2 - 14x
0 = 8x^2 - 14x - 15

Now you need two numbers that add to -14 and multiply to the product of 8 and -15, which is -120.
I like to organize it like this
The numbers are -20 and 6.

Now break down -14x into -20x + 6x
0 = 8x^2 - 20x + 6x - 15
0 = 4x(2x - 5) + 3(2x -5)

Factor out 2x-5
0 = (2x - 5)(4x + 3)
2x - 5=0
x = 5/2

4x + 3 = 0
x = -3/4

Answer 15

yes thats the ac method