Advanced Math practice question

Answer: 16

(a − b)² = a² − 2ab + b² = 40 − 24 = 16.

Common wrong answers

If you answered 4

4 is a − b, not its square.

If you answered 28

28 subtracts ab once.

If you answered 64

64 is (a + b)², adding 2ab instead of subtracting.

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