Advanced Math practice question

Answer: 8

(x + 2)² − (x − 2)² = 8x, and 8x/x = 8.

Common wrong answers

If you answered 0

0 assumes the two squares are equal.

If you answered 4

4 counts the cross terms once each instead of twice.

If you answered 8x

The x cancels; the result is a constant.

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