Question

Evaluate the following expression using the values given:

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

Answer 1

plug in the values they gave you for a, b and c into the equation

Answer 2

In theory you should be able to solve this piece by piece. It gives you what each of the letters mean so it's just a job of plugging in the values. An example is the first concoction of numbers

-3a2

turns into

-3(2)2

Answer 3

If you can understand that then the second part should be simple.