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\frac{15}{100}\times 9600x^{2}=1380
Multiply both sides of the equation by 3.
\frac{3}{20}\times 9600x^{2}=1380
Reduce the fraction \frac{15}{100} to lowest terms by extracting and canceling out 5.
1440x^{2}=1380
Multiply \frac{3}{20} and 9600 to get 1440.
x^{2}=\frac{1380}{1440}
Divide both sides by 1440.
x^{2}=\frac{23}{24}
Reduce the fraction \frac{1380}{1440} to lowest terms by extracting and canceling out 60.
x=\frac{\sqrt{138}}{12} x=-\frac{\sqrt{138}}{12}
Take the square root of both sides of the equation.
\frac{15}{100}\times 9600x^{2}=1380
Multiply both sides of the equation by 3.
\frac{3}{20}\times 9600x^{2}=1380
Reduce the fraction \frac{15}{100} to lowest terms by extracting and canceling out 5.
1440x^{2}=1380
Multiply \frac{3}{20} and 9600 to get 1440.
1440x^{2}-1380=0
Subtract 1380 from both sides.
x=\frac{0±\sqrt{0^{2}-4\times 1440\left(-1380\right)}}{2\times 1440}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 1440 for a, 0 for b, and -1380 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\times 1440\left(-1380\right)}}{2\times 1440}
Square 0.
x=\frac{0±\sqrt{-5760\left(-1380\right)}}{2\times 1440}
Multiply -4 times 1440.
x=\frac{0±\sqrt{7948800}}{2\times 1440}
Multiply -5760 times -1380.
x=\frac{0±240\sqrt{138}}{2\times 1440}
Take the square root of 7948800.
x=\frac{0±240\sqrt{138}}{2880}
Multiply 2 times 1440.
x=\frac{\sqrt{138}}{12}
Now solve the equation x=\frac{0±240\sqrt{138}}{2880} when ± is plus.
x=-\frac{\sqrt{138}}{12}
Now solve the equation x=\frac{0±240\sqrt{138}}{2880} when ± is minus.
x=\frac{\sqrt{138}}{12} x=-\frac{\sqrt{138}}{12}
The equation is now solved.