Question 325780
g(3)=-3^(2)+4(3)

Squaring a number is the same as multiplying the number by itself (3*3).  In this case, 3 squared is 9.
g(3)=-9+4(3)

Multiply 4 by each term inside the parentheses.
g(3)=-9+12

Add 12 to -9 to get 3.
g(3)=3