Advanced Math practice question

Answer: A. 2x² + x − 1

Dividing by (x − 3), or checking that (x − 3)(2x² + x − 1) expands to the polynomial.

Why the other answers are wrong

B. 2x² − x − 1

(x − 3)(2x² − x − 1) has middle terms −7x², not −5x².

C. 2x² + x + 1

The constant would be −3, not +3.

D. 2x² − 11x − 1

The x² coefficient would be −17.

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