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5=125x^{2}+\frac{1}{2}\times 50\left(x+0\times 2\right)^{2}
Multiply \frac{1}{2} and 250 to get 125.
5=125x^{2}+25\left(x+0\times 2\right)^{2}
Multiply \frac{1}{2} and 50 to get 25.
5=125x^{2}+25\left(x+0\right)^{2}
Multiply 0 and 2 to get 0.
5=125x^{2}+25x^{2}
Anything plus zero gives itself.
5=150x^{2}
Combine 125x^{2} and 25x^{2} to get 150x^{2}.
150x^{2}=5
Swap sides so that all variable terms are on the left hand side.
x^{2}=\frac{5}{150}
Divide both sides by 150.
x^{2}=\frac{1}{30}
Reduce the fraction \frac{5}{150} to lowest terms by extracting and canceling out 5.
x=\frac{\sqrt{30}}{30} x=-\frac{\sqrt{30}}{30}
Take the square root of both sides of the equation.
5=125x^{2}+\frac{1}{2}\times 50\left(x+0\times 2\right)^{2}
Multiply \frac{1}{2} and 250 to get 125.
5=125x^{2}+25\left(x+0\times 2\right)^{2}
Multiply \frac{1}{2} and 50 to get 25.
5=125x^{2}+25\left(x+0\right)^{2}
Multiply 0 and 2 to get 0.
5=125x^{2}+25x^{2}
Anything plus zero gives itself.
5=150x^{2}
Combine 125x^{2} and 25x^{2} to get 150x^{2}.
150x^{2}=5
Swap sides so that all variable terms are on the left hand side.
150x^{2}-5=0
Subtract 5 from both sides.
x=\frac{0±\sqrt{0^{2}-4\times 150\left(-5\right)}}{2\times 150}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 150 for a, 0 for b, and -5 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\times 150\left(-5\right)}}{2\times 150}
Square 0.
x=\frac{0±\sqrt{-600\left(-5\right)}}{2\times 150}
Multiply -4 times 150.
x=\frac{0±\sqrt{3000}}{2\times 150}
Multiply -600 times -5.
x=\frac{0±10\sqrt{30}}{2\times 150}
Take the square root of 3000.
x=\frac{0±10\sqrt{30}}{300}
Multiply 2 times 150.
x=\frac{\sqrt{30}}{30}
Now solve the equation x=\frac{0±10\sqrt{30}}{300} when ± is plus.
x=-\frac{\sqrt{30}}{30}
Now solve the equation x=\frac{0±10\sqrt{30}}{300} when ± is minus.
x=\frac{\sqrt{30}}{30} x=-\frac{\sqrt{30}}{30}
The equation is now solved.