Question

Evaluate the following expression using the values given:
Find x3 - 2y2 - 3x3 + z4 if x = 3, y = 5, and z = -3.

Answer 1

\[ x^3 - 2y^2 - 3x^3 + z^4=-2x^3+2y^2+z^4\]
is a start

Answer 2

then compute
\[-2(3)^3-2(5)^2+(-3)^4\]
i would use a calculator

Answer 3

http://www.wolframalpha.com/input/?i=-2%283%29^3-2%285%29^2%2B%28-3%29^4

Answer 4

i dont have one

Answer 5

it's like
\[-2(3*3*3)-2(5*5)+((-3)(-3)(-3)(-3))\]
-2(9(3)) - 2(25) + (9)(9)
-2(27)-50+81
-54-50+81
-23 --> answer