To solve the equation \( 2x^2 = 20 \), we first simplify it:
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Divide both sides by 2: \[ x^2 = 10 \]
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Next, take the square root of both sides: \[ x = \pm \sqrt{10} \]
This means there are two solutions: \( \sqrt{10} \) and \( -\sqrt{10} \).
Thus, the correct response is Two.