I do not remember exactly what to do, but I think you should try to substitute x with -3. This is because
f(-3) is the same as f(x), except that x is already provided.
given the function rule f(x)=x^2-4x+3, what is the output of f(-3)
2 answers
(-3)^2 -4(-3) + 3
9 + 12 + 3
24
9 + 12 + 3
24