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Anonymous Anonymous
  • 22-02-2017
  • Mathematics
Answered

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


Is -3 the correct answer?

Verified Answer :

jackmac1 jackmac1
  • 22-02-2017

We're given the algebraic expression 2x^2 - 2z^4 + y^2 - x^2 + z^4

By hypothesis, x = -4, y = 3 and z = 2

Let's replace each letter by its given value:

2x^2 - 2z^4 + y^2 - x^2 + z^4
2(-4)^2 - 2(2)^4 + (3)^2 - (-4)^2 + (2)^4
(216) - 216 + 9 - 16 + 16
32 - 32 + 9 - 16 + 16
9

So wrong. The correct answer is not -3, but 9.

Hope this helps! :D

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