Question

Give the values of a, b, and c from the general form of the equation (2x + 1)(x - 2) = 0.

a) a = 2, b = -3, c = -2
b) a = 2, b = 5, c = -2
c) a = 3, b = 1, c = -1

Answer 1

Multiply the expression as indicated: Use FOIL if you wish,
You should get the following:

Answer 2

\[2x ^{2}-3x-2=0\]

Answer 3

a=2, b=-3, c=-2

Answer 4

you need to use the FOIL method (F) stands for First, (o) stands for Outer, (I) stands for inner and (L) stand for last. So therefore

(2xa1)(x-2) so F=2x.x
O=2x.-2
I=1.x
L=1.-2

So FOIL yeilds 2x^2-4x+X-2 now simplify so we get 2x^2-3x-2. This is a quadratic funtion that has the form ax+bx+c So a=2, b=-3 and c=-2 chow!