Question

What are the x-intercepts of the graph of the function f(x) = x2 + 4x – 12?

Answer 1

Answer:

(-6,0),(2,0)

Step-by-step explanation:

x-intercept

at x-intercept y=0

f(x)=x^2+4x-12

x^2+4x-12=0

by using factorisation method

product=-12

sum=4

factors=6,-2

(x^2 -2x)+(6x-12)=0

x(x-2)+6(x-2)=0

(x+6)(x-2)=0

x+6=0, x-2=0

x= -6,x=2

Answer 2

Answer:

The x intercepts would be (-6; 0) and (2; 0).

Step-by-step explanation:

Take a look at the picture.

Calculate it replacing f(x) with 0. The result will be: x1 = -6, x2 = 2 (consequently, both y's equal 0).