How do i find the value of f(3) f(x)= -x^2+3?

Question

NEED ALGEBRA HELP

Answer 1

Take the number inside the f() and put it where the x is in that equation.  Then solve the equation.  So f(3) would be -3^2 + 3.  Now, be sure you wrote it right.  Is it -(x^2)+3 or is it (-x)^2+3??

Answer 2

omg! i love dese *im such a math nerd.

ok if f(x)=-x^2+3

and x=3

den f(3)=-(3)^2+3

              (-3)^2+3

              9+3

               12

      f(3) in this situation=s 12