Question

Let f(x) = -2x2 and g(x) = 2x – 4. Using your graphing calculator,

determine and state all values of x for which f(x) = g(x).

Answer 1

1 and -2

Explanation:

-2x^2=2x-4 so 2x^2 + 2x -4 = 0

2(x^2+x-2)=0

x^2+x-2 = (x-1)(x+2)

x=1 x=-2