Solve for x
x=-\frac{y^{2}}{2}+4
y\geq 0
Solve for x (complex solution)
x=-\frac{y^{2}}{2}+4
arg(y)<\pi \text{ or }y=0
Solve for y
y=\sqrt{8-2x}
x\leq 4
Graph
Share
Copied to clipboard
\sqrt{8-2x}=y
Swap sides so that all variable terms are on the left hand side.
-2x+8=y^{2}
Square both sides of the equation.
-2x+8-8=y^{2}-8
Subtract 8 from both sides of the equation.
-2x=y^{2}-8
Subtracting 8 from itself leaves 0.
\frac{-2x}{-2}=\frac{y^{2}-8}{-2}
Divide both sides by -2.
x=\frac{y^{2}-8}{-2}
Dividing by -2 undoes the multiplication by -2.
x=-\frac{y^{2}}{2}+4
Divide y^{2}-8 by -2.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}