Solve for u
u=6\sqrt{2}-6\approx 2.485281374
u=-6\sqrt{2}-6\approx -14.485281374
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\left(u+6\right)^{2}-72+72=72
Add 72 to both sides of the equation.
\left(u+6\right)^{2}=72
Subtracting 72 from itself leaves 0.
u+6=6\sqrt{2} u+6=-6\sqrt{2}
Take the square root of both sides of the equation.
u+6-6=6\sqrt{2}-6 u+6-6=-6\sqrt{2}-6
Subtract 6 from both sides of the equation.
u=6\sqrt{2}-6 u=-6\sqrt{2}-6
Subtracting 6 from itself leaves 0.
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