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1200=x^{2}
Multiply 60 and 20 to get 1200.
x^{2}=1200
Swap sides so that all variable terms are on the left hand side.
x=20\sqrt{3} x=-20\sqrt{3}
Take the square root of both sides of the equation.
1200=x^{2}
Multiply 60 and 20 to get 1200.
x^{2}=1200
Swap sides so that all variable terms are on the left hand side.
x^{2}-1200=0
Subtract 1200 from both sides.
x=\frac{0±\sqrt{0^{2}-4\left(-1200\right)}}{2}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and -1200 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-1200\right)}}{2}
Square 0.
x=\frac{0±\sqrt{4800}}{2}
Multiply -4 times -1200.
x=\frac{0±40\sqrt{3}}{2}
Take the square root of 4800.
x=20\sqrt{3}
Now solve the equation x=\frac{0±40\sqrt{3}}{2} when ± is plus.
x=-20\sqrt{3}
Now solve the equation x=\frac{0±40\sqrt{3}}{2} when ± is minus.
x=20\sqrt{3} x=-20\sqrt{3}
The equation is now solved.