Question

Evaluate the following expression using the values given:

Find x3 - 2y2 - 3x3 + z4 if x = 3, y = 5, and z = -3.

Answer 1

just sub you values into the equation
x^3 - 2y^2 - 3x^3 + z^4-----x = 3, y = 5, z = -3
3^3 - 2(5^2) - 3(3^3) + (-3^4)
27 - 2(25) - 3(27) - 81
27 - 50 - 81 - 81
- 212 + 27
- 185