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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Simplify: 20+45\sqrt{20} + \sqrt{45}.

  • A

    13513\sqrt{5}

  • B

    65\sqrt{65}

  • C

    900\sqrt{900}

  • D

    555\sqrt{5}

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Explanation

20=25\sqrt{20} = 2\sqrt{5}, 45=35\sqrt{45} = 3\sqrt{5}, sum =55= 5\sqrt{5}.

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