Jimmy Evans
3.5K posts


@mathtech789 xsqrt(2)= sqrt(32)= 4sqrt(2) => x = 4 (the side of the square) so perimeter = 4 . 4= 16 cm

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@mathtech789 sqr(8) + sqrt(18) = 2sqrt(2) + 3sqrt(2) = 5sqrt(2)
so the answer is "none!"
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@mathtech789 =>(x+6)(x-6) = 13 = (7+6)(7-6) => x =7
or =(-7+6)(-7-6) => x=-7
or x^2 -36 = 13 => x^2 = 49 => x= +(-)7
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