Factor
-x\left(3-x\right)^{2}
Evaluate
-x\left(3-x\right)^{2}
Graph
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x\left(-x^{2}+6x-9\right)
Factor out x.
a+b=6 ab=-\left(-9\right)=9
Consider -x^{2}+6x-9. Factor the expression by grouping. First, the expression needs to be rewritten as -x^{2}+ax+bx-9. To find a and b, set up a system to be solved.
1,9 3,3
Since ab is positive, a and b have the same sign. Since a+b is positive, a and b are both positive. List all such integer pairs that give product 9.
1+9=10 3+3=6
Calculate the sum for each pair.
a=3 b=3
The solution is the pair that gives sum 6.
\left(-x^{2}+3x\right)+\left(3x-9\right)
Rewrite -x^{2}+6x-9 as \left(-x^{2}+3x\right)+\left(3x-9\right).
-x\left(x-3\right)+3\left(x-3\right)
Factor out -x in the first and 3 in the second group.
\left(x-3\right)\left(-x+3\right)
Factor out common term x-3 by using distributive property.
x\left(x-3\right)\left(-x+3\right)
Rewrite the complete factored expression.
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}