Answer:
18
Step-by-step explanation:
g(x) = x^2
g(3) = 3^2 =9
g(-3) = (-3)^2 = 9
g(3) + g(-3) = 9+9 =18
g ( x) = x²
g ( 3 ) = ( 3 )² = 9
g ( -3 ) = ( - 3 )²
g ( - 3 ) = 9
g( 3 ) + g ( -3 ) = 9 + 9 = 18
