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

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

radar · Answer

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

radar · Answer

$$2x ^{2}-3x-2=0$$

radar · Answer

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

anonymous · Answer

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!