Question

Calcule f(x) = 5x² - 3 para x = 3

Answer 1

5x^2 - 3 com x = 3
5 * 3^2 -3 ( 3^2 = 3*3)
5 * 9 - 3
45 - 3
42

Answer 2

F(x)=5x²-3 ----> F(3)= 5*3²-3 ----> F(3)= 5*9-3 ----> F(3)= 45-3 ----> F(3)= 42