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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Solve 4x2−9=04x^2 - 9 = 0.

  • A

    x=±3x = \pm 3

  • B

    x=±3/2x = \pm 3/2

    check_circle
  • C

    x=3/2x = 3/2 only

  • D

    x=±9/4x = \pm 9/4

Explanation

(2x−3)(2x+3)=0(2x-3)(2x+3) = 0, so x=±3/2x = \pm 3/2.

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