Asked by Lea

multiply using FOIL and identify values of a, b, & c.
(5x +5)(6x - 8)
Answered by Candy
30x^2-10x-10

And what do you mean about the values of a,b,and c
Answered by Lea
That's just the way the question was asked?
Answered by Damon
30 x^2 -10 x - 40

a = 30
b = -10
c = -40
Answered by Lea
Thanks!
Answered by Damon
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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