Question

Find -3a2 - b3 + 3c2 - 2b3 if a = 2, b = -1, and c = 3.

Answer 1

-3a^2 - b^3 + 3c^2 - 2b^3 -- (a = 2, b = -1, and c = 3)
sub in your values for each variable
-3(2^2) - (-1^3) + 3(3^2) - 2(-1^2)
-3(4) - (-1) + 3(9) - 2(1)
-12 + 1 + 27 - 2
28 - 14
14