Solve for v
v=120\sqrt{10}\approx 379.47331922
v=-120\sqrt{10}\approx -379.47331922
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v^{2}=0+18\times 8\times 10^{3}
Multiply 2 and 9 to get 18.
v^{2}=0+144\times 10^{3}
Multiply 18 and 8 to get 144.
v^{2}=0+144\times 1000
Calculate 10 to the power of 3 and get 1000.
v^{2}=0+144000
Multiply 144 and 1000 to get 144000.
v^{2}=144000
Add 0 and 144000 to get 144000.
v=120\sqrt{10} v=-120\sqrt{10}
Take the square root of both sides of the equation.
v^{2}=0+18\times 8\times 10^{3}
Multiply 2 and 9 to get 18.
v^{2}=0+144\times 10^{3}
Multiply 18 and 8 to get 144.
v^{2}=0+144\times 1000
Calculate 10 to the power of 3 and get 1000.
v^{2}=0+144000
Multiply 144 and 1000 to get 144000.
v^{2}=144000
Add 0 and 144000 to get 144000.
v^{2}-144000=0
Subtract 144000 from both sides.
v=\frac{0±\sqrt{0^{2}-4\left(-144000\right)}}{2}
This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and -144000 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
v=\frac{0±\sqrt{-4\left(-144000\right)}}{2}
Square 0.
v=\frac{0±\sqrt{576000}}{2}
Multiply -4 times -144000.
v=\frac{0±240\sqrt{10}}{2}
Take the square root of 576000.
v=120\sqrt{10}
Now solve the equation v=\frac{0±240\sqrt{10}}{2} when ± is plus.
v=-120\sqrt{10}
Now solve the equation v=\frac{0±240\sqrt{10}}{2} when ± is minus.
v=120\sqrt{10} v=-120\sqrt{10}
The equation is now solved.
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