Evaluate
2\left(x-3\right)\left(x-2\right)
Expand
2x^{2}-10x+12
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x^{2}-6x+9+\left(2x-6\right)\left(x+1\right)-x^{2}+9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-3\right)^{2}.
x^{2}-6x+9+2x^{2}-4x-6-x^{2}+9
Use the distributive property to multiply 2x-6 by x+1 and combine like terms.
3x^{2}-6x+9-4x-6-x^{2}+9
Combine x^{2} and 2x^{2} to get 3x^{2}.
3x^{2}-10x+9-6-x^{2}+9
Combine -6x and -4x to get -10x.
3x^{2}-10x+3-x^{2}+9
Subtract 6 from 9 to get 3.
2x^{2}-10x+3+9
Combine 3x^{2} and -x^{2} to get 2x^{2}.
2x^{2}-10x+12
Add 3 and 9 to get 12.
x^{2}-6x+9+\left(2x-6\right)\left(x+1\right)-x^{2}+9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-3\right)^{2}.
x^{2}-6x+9+2x^{2}-4x-6-x^{2}+9
Use the distributive property to multiply 2x-6 by x+1 and combine like terms.
3x^{2}-6x+9-4x-6-x^{2}+9
Combine x^{2} and 2x^{2} to get 3x^{2}.
3x^{2}-10x+9-6-x^{2}+9
Combine -6x and -4x to get -10x.
3x^{2}-10x+3-x^{2}+9
Subtract 6 from 9 to get 3.
2x^{2}-10x+3+9
Combine 3x^{2} and -x^{2} to get 2x^{2}.
2x^{2}-10x+12
Add 3 and 9 to get 12.
Examples
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{ 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}