Solve for x
x=10
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x-2\left(-7\right)^{0}=2\sqrt{\left(-5\right)^{2}-\left(-3\right)^{2}}
Multiply both sides of the equation by 2.
x-2\times 1=2\sqrt{\left(-5\right)^{2}-\left(-3\right)^{2}}
Calculate -7 to the power of 0 and get 1.
x-2=2\sqrt{\left(-5\right)^{2}-\left(-3\right)^{2}}
Multiply 2 and 1 to get 2.
x-2=2\sqrt{25-\left(-3\right)^{2}}
Calculate -5 to the power of 2 and get 25.
x-2=2\sqrt{25-9}
Calculate -3 to the power of 2 and get 9.
x-2=2\sqrt{16}
Subtract 9 from 25 to get 16.
x-2=2\times 4
Calculate the square root of 16 and get 4.
x-2=8
Multiply 2 and 4 to get 8.
x=8+2
Add 2 to both sides.
x=10
Add 8 and 2 to get 10.
Examples
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}