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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 4/5

For which xx is (x+3)(x−1)>0(x+3)(x-1) > 0?

  • A

    All real xx

  • B

    x<−3x < -3 or x>1x > 1

    check_circle
  • C

    x>−3x > -3

  • D

    −3<x<1-3 < x < 1

Explanation

Product positive when both factors same sign: x<−3x < -3 or x>1x > 1.

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