If 2x2 = 250 then x2 = 250/2 = 125
So x = sqrt(125) = 5*sqrt(5) = +/- 5*2.236 = + or - 11.180
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2
√8 = 2√2 ≈ 2.828
x^2 +9 =x^2 -9 9=-9 No solution
The solutions are: x = 4, y = 2 and x = -4, y = -2
So what is the question?