Question

Consider the function f(x) = x2 + 3x − 7. Find the value of f(x) when x = 3 and select the correct answer below. 5 8 11 18

Answer 1

8 because 3•2+3•3-7=8

Answer 2

if f(x) = x² + 3x − 7
then if your finding when x= 3 then simply subtitute x for three in the equation and then solve it

∴      f(3) = (3)² + 3(3) - 7
              = 9 + 9 - 7
              = 11