Question

Use the zero product property to find the solutions to the equation x2 + x – 30 = 12.
x = –7 or x = 6
x = –7 or x = –6
x = –6 or x = 7
x = 6 or x = 7

Answer 1

f (-7)= (-7)^2-7-30-12

f (-7)=0

f (6)=(6)^2+6-30-12

f (6)=0

Therefore x=-7 i.e. x+7

and

x=6 i.e. x-6 are the solutions of f (x)

Hope this helps u.