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30+6(21^0.5) ~ 57.49545

30-6(21^0.5) ~ 2.50455

X*Y=144

X=144/Y

X+Y=60

X=60-Y

144/y = 60 - Y

144 = 60Y - Y^2

Y^2-60Y+144=0

Quadratic equation gives you:

30+6(21^0.5) ~57.49545

30-6(21^0.5) ~2.50455

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