Question

Let f(x) = x2 - 3x - 7. Find f(-3)

Answer 1

$f(x)=x^2-3x-7\\\\ f(-3)\\ Substitute\ x=-3\\\\ f(-3)=(-3)^2-3*(-3)-7\\ f(-3)=9+9-7=18-7=11\\\\\ Solution\ is\ f(-3)=11$