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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Solve 9x2−4=09x^2 - 4 = 0.

  • A

    x=±2x = \pm 2

  • B

    x=±4/9x = \pm 4/9

  • C

    x=2/3x = 2/3 only

  • D

    x=±2/3x = \pm 2/3

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Explanation

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

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