Question

The graph of the function f(x) = (x + 2)(x - 4) is shown.

A. all real values of x where x < -2

B. all real values of x where -2
C. all real values of x where 1 D. all real values of x where x <0

Answer 1

B) All real values of 'x' where -2 < x< 4

Explanation:

Explanation:-

Given function f(x) = (x +2 ) ( x-4)

(x+2)(x-4) =0

⇒ x +2 =0 and x-4=0

⇒ x =-2 and x=4

From graph

Given parabola lies between the x=-2 and x =4

∴ All real values of 'x' lies between x=-2 and x =4

All real values of 'x' lies -2 < x< 4