Advanced Math practice question

Answer: 8

The x³ term comes from choosing 2 from one of the four factors and x from the other three: 4 × 2 = 8. (Full expansion: x⁴ + 8x³ + 24x² + 32x + 16.)

Common wrong answers

If you answered 2

2 forgets that any of the four factors can supply the 2.

If you answered 4

4 counts the factors but forgets to multiply by 2.

If you answered 24

24 is the coefficient of x².

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