Advanced Math practice question

Answer: -2

Multiply by x: 2 = x² − x → x² − x − 2 = 0 → (x − 2)(x + 1) = 0. The solutions are 2 and −1, whose product is −2.

Common wrong answers

If you answered 1

1 is the sum of the solutions.

If you answered 2

2 has the wrong sign; the product of the roots of x² − x − 2 is −2.

If you answered -1

−1 is one solution alone.

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