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x^2 + 2 sqrt5 [#permalink]
1
x^2=36-20
x^2=16
x=+4 and x=-4
mod x=4
option C is the correct answer.
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Re: x^2 + 2 sqrt5 [#permalink]
It shouldn't matter whether x is -4 or 4, because A specifies the absolute value of x as the quantity we are using in the comparison of values, no?

I thought C is therefore the answer, but who knows.
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Re: x^2 + 2 sqrt5 [#permalink]
toantoantoan mod value is always positive.
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Re: x^2 + 2 sqrt5 [#permalink]
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