Question

Find all real values of x, such that f(x)=0.
f(x)=15-3x

Answer 1

That only means that you have to solve f(x)=0
15-3x=0
15=3x
5=x

Answer 2

thanks!

Answer 3

what about find the value(s) of x for which f(x)=g(x), given f(x)=x^2 and g(x)=x+2

Answer 4

you can set them equal to each other and then solve for x

Answer 5

Than you have to solve:
x^2=x+2
x^2-x-2=0
(x-2)(x+1)=0
x=2 or
x=-1

Answer 6

thank you so much!