Advanced Math practice question

Answer: -36

The product of conjugates gives a difference of squares: x² − 36, so c = −36.

Common wrong answers

If you answered 0

The middle terms cancel, but the constant term 6 · (−6) = −36 remains.

If you answered 36

The constant is 6 · (−6) = −36 — negative.

If you answered -12

−12 adds the constants; they multiply: 6 · (−6) = −36.

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