Question

The function g is defined by g(x)=(2x-3)(x+k)

Given that g(0)=-15 find
k
x such that g(x)=0

Answer 1

Explanation:

Put in '0' for 'x'

(2(0) -3) (0+k) = -3k = -15 shows k = 5

(2x-3)(x-5) =0 shows when x = 5 or 3/2 g(x) = 0