Advanced Math practice question

Answer: 2

Multiplying out, x³ + (2 + b)x² + (2b + c)x + 2c; matching x³ + 8 gives b = −2 and c = 4, so b + c = 2.

Common wrong answers

If you answered 4

4 is c alone.

If you answered 6

6 uses b = 2 with the sign wrong.

If you answered -2

−2 is b alone.

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