Advanced Math practice question

Answer: 10

Distribute: 2x · x + 2x · 5 = 2x² + 10x, so b = 10.

Common wrong answers

If you answered 2

2 is the coefficient a of x²; the x-coefficient is 10.

If you answered 5

5 must still be multiplied by the 2x outside: 2 · 5 = 10.

If you answered 7

Multiply 2 by 5 rather than adding them.

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