Test: PSAT Math

1.

Solve for \dpi{100} x:

x\sqrt{45}+x\sqrt{72}=\sqrt{18}

x=\sqrt{9}

x=\frac{\sqrt{2}}{\sqrt{5}+2\sqrt{2}}

x=\frac{\sqrt{5}}{\sqrt{2}}+2

x=\frac{\sqrt{2}}{\sqrt{5}}+\frac{1}{2}

x=3

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