Solve for y
y=x\left(x-4\right)
x\neq -4
Solve for x (complex solution)
\left\{\begin{matrix}\\x=\sqrt{y+4}+2\text{, }&\text{unconditionally}\\x=-\sqrt{y+4}+2\text{, }&y\neq 32\end{matrix}\right.
Solve for x
\left\{\begin{matrix}x=\sqrt{y+4}+2\text{, }&y\geq -4\\x=-\sqrt{y+4}+2\text{, }&y\neq 32\text{ and }y\geq -4\end{matrix}\right.
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y=\frac{x\left(x-4\right)\left(x+4\right)}{x+4}
Factor the expressions that are not already factored in \frac{x^{3}-16x}{x+4}.
y=x\left(x-4\right)
Cancel out x+4 in both numerator and denominator.
y=x^{2}-4x
Expand the expression.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}