Advanced Math practice question

Answer: -5

2x + 2y + 3x − 3y = 5x − y, so a = 5, b = −1 and ab = −5.

Common wrong answers

If you answered 4

4 is a + b.

If you answered 5

5 forgets the sign of b.

If you answered -15

−15 uses b = −3, forgetting the +2y.

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