Question

Find all real zeros in the function f(x)=2(x+2)^2(x^2-9)(x-2)

Answer 1

X=2, -2, 3, -3
x+2= 0
x=-2 (this is a repeated answer so it only needs to be put once)

x^2 -9=0
x^2=9
x=3,-3

x-2=0
x=2