Posted by **Lea** on Thursday, March 7, 2013 at 8:26pm.

multiply using FOIL and identify values of a, b, & c.

(5x +5)(6x - 8)

- algebra -
**Candy**, Thursday, March 7, 2013 at 8:34pm
30x^2-10x-10

And what do you mean about the values of a,b,and c

- algebra -
**Lea**, Thursday, March 7, 2013 at 8:36pm
That's just the way the question was asked?

- algebra -
**Damon**, Thursday, March 7, 2013 at 8:36pm
30 x^2 -10 x - 40

a = 30

b = -10

c = -40

- algebra -
**Lea**, Thursday, March 7, 2013 at 8:37pm
Thanks!

- algebra -
**Damon**, Thursday, March 7, 2013 at 8:38pm
I assume it means a, b and c in quadratic formula

if

a x^2 + b x + c = 0

then

x = [ -b +/- sqrt (b^2-4ac) ] / 2a

Which I used to factor the expression in your question Lea.

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