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Polynomials

Question

Value of $fraction numerator 1 over denominator square root of 18 minus square root of 32 end fraction$ is equal to:
$square root of 2$
$negative square root of 2$
$fraction numerator 1 over denominator square root of 2 end fraction$
$negative fraction numerator 1 over denominator square root of 2 end fraction$

Solution

negative fraction numerator 1 over denominator square root of 2 end fraction