Question

56s^2+23s-63 Need help solving this one

Answer 1

= 0 ?

Answer 2

56s^2+23s-63 = 0?

Answer 3

Nope have to factor this out. I know the common denominator is 7 but I get lost and confused after that .

Answer 4

oh just use the discriminant..

Answer 5

D = b^2 - 4ac

Answer 6

(7s+9)(8x-7) if I did it right.

Answer 7

Ok this is what I get
56s^2+23s-63
(56s+ )(s- )

Answer 8

oops I meant for the second one to be an s as well

Answer 9

D = 529 + 14112

Answer 10

Now got to figure out what the numbers are for the remaining. I know that 9*7 is 63 But when you work it into the problem and then use the foil method I dont get the 23s in the middle
Have also tried 12*3

Answer 11

x1 = (- 23 - 121)/(2*56) = 9/7

Answer 12

(7s+9)(8s-7)

Answer 13

x2 = (- 23 + 121)/(2*56) = 7/8

Answer 14

TBates you rock!!!!!

Answer 15

I used the quadratic equation to find one of the zeros and worked backwards to get the factors.

Answer 16

Thank you thank you thank you !

Answer 17

well that's what i suggested.. wasn't it?

Answer 18

(x - 9/7)(x - 7/8)

Answer 19

That it is. The quadratic formula will always work!

Answer 20

yes it was you were correct as well