Solve for y
y=\frac{x^{2}+4}{2}
Solve for x (complex solution)
x=-\sqrt{2\left(y-2\right)}
x=\sqrt{2\left(y-2\right)}
Solve for x
x=\sqrt{2\left(y-2\right)}
x=-\sqrt{2\left(y-2\right)}\text{, }y\geq 2
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-2y+4=-x^{2}
Subtract x^{2} from both sides. Anything subtracted from zero gives its negation.
-2y=-x^{2}-4
Subtract 4 from both sides.
\frac{-2y}{-2}=\frac{-x^{2}-4}{-2}
Divide both sides by -2.
y=\frac{-x^{2}-4}{-2}
Dividing by -2 undoes the multiplication by -2.
y=\frac{x^{2}}{2}+2
Divide -x^{2}-4 by -2.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
699 * 533
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
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