Solve for y
y=x\left(x-4\right)
x\neq 3
Solve for x (complex solution)
\left\{\begin{matrix}\\x=-\sqrt{y+4}+2\text{, }&\text{unconditionally}\\x=\sqrt{y+4}+2\text{, }&y\neq -3\end{matrix}\right.
Solve for x
\left\{\begin{matrix}x=\sqrt{y+4}+2\text{, }&y\neq -3\text{ and }y\geq -4\\x=-\sqrt{y+4}+2\text{, }&y\geq -4\end{matrix}\right.
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y=\frac{x\left(x-4\right)\left(x-3\right)}{x-3}
Factor the expressions that are not already factored in \frac{x^{3}-7x^{2}+12x}{x-3}.
y=x\left(x-4\right)
Cancel out x-3 in both numerator and denominator.
y=x^{2}-4x
Expand the expression.
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Limits
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