multiply using FOIL and identify values of a, b, & c.
(5x +5)(6x - 8)
30x^2-10x-10
And what do you mean about the values of a,b,and c
That's just the way the question was asked?
30 x^2 -10 x - 40
a = 30
b = -10
c = -40
Thanks!
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.
To multiply using the FOIL method, which stands for First, Outer, Inner, Last, follow these steps:
1. First: Multiply the first terms of each binomial together.
(5x)(6x) = 30x^2
2. Outer: Multiply the terms on the outside of each binomial together.
(5x)(-8) = -40x
3. Inner: Multiply the terms on the inside of each binomial together.
(5)(6x) = 30x
4. Last: Multiply the last terms of each binomial together.
(5)(-8) = -40
Now, add the results together to get the simplified expression:
30x^2 - 40x + 30x - 40
Combine like terms:
30x^2 - 10x - 40
From the original expression, we can identify the values of a, b, and c as follows:
a = 30
b = -10
c = -40