Question

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

I've tried to do this over and over and I just can get it.

Answer 1

\[2(-4)^2 - 2(2)^4 + 3^2 - (-4)^2 + 2^4\]all the terms with 16 in it cancel out

Answer 2

\[=2*16 - 2*16 + 9 - 16 + 16 = 9\]

Answer 3

Okay so the answer is 9?
if so can you explain
to me why?

Answer 4

all the terms with 16 are cancelled.

2*16 - 2*16 = 0
and the last 2
-16 + 16 = 0

Answer 5

equivalent to

x^2 - z^4 + y^2

and x^2 = z^4

Answer 6

Which make 9?

Answer 7

all thats left over is y^2 = 9

Answer 8

OHHH Okay :)