Question

2x2 - 2z4 + y2 - x2 + z4 if x = -4, y = 3, and z = 2.

Answer 1

\[2x^2 - 2z^4 + y^2 - x^2 + z^4\]lets combine like terms first

Answer 2

\(2x^2-x^2=x^2\)
\(x^4-2z^4=-z^4\)
so now it will be a bit easier if we write
\[x^2+y^2-z^4\]

Answer 3

make the replacements
\[(-4)^2+3^2-(2)^4\] and arithmetic gets the answer

Answer 4

4-8+6+8+8
18 is answer