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Equivalent Expressions

SAT Math· difficulty 4/5

Which is a factor of x3−7x−6x^3 - 7x - 6?

  • A

    x+6x + 6

  • B

    x+1x + 1

    check_circle
  • C

    x−7x - 7

  • D

    x−1x - 1

Explanation

Test x=−1x = -1: (−1)3−7(−1)−6=−1+7−6=0(-1)^3 - 7(-1) - 6 = -1 + 7 - 6 = 0. So x+1x + 1 is a factor.

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