You can put this solution on YOUR website! x^2<= sqrt( 2 )*x^2
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x^2 - sqrt(2)*x^2 <=0
Factor:
x^2(1-sqrt(2)) <= 0
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x^2(-0.414) <= 0
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Divide both sides by the negative to get:
x^2 >= 0
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x is Any Real Number.
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Cheers,
Stan H.