Evaluate
3\left(x-5\right)^{2}
Expand
3x^{2}-30x+75
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3x^{2}-6x-\left(x-6\right)-23\left(x-3\right)
Use the distributive property to multiply 3x by x-2.
3x^{2}-6x-x-\left(-6\right)-23\left(x-3\right)
To find the opposite of x-6, find the opposite of each term.
3x^{2}-6x-x+6-23\left(x-3\right)
The opposite of -6 is 6.
3x^{2}-7x+6-23\left(x-3\right)
Combine -6x and -x to get -7x.
3x^{2}-7x+6-23x+69
Use the distributive property to multiply -23 by x-3.
3x^{2}-30x+6+69
Combine -7x and -23x to get -30x.
3x^{2}-30x+75
Add 6 and 69 to get 75.
3x^{2}-6x-\left(x-6\right)-23\left(x-3\right)
Use the distributive property to multiply 3x by x-2.
3x^{2}-6x-x-\left(-6\right)-23\left(x-3\right)
To find the opposite of x-6, find the opposite of each term.
3x^{2}-6x-x+6-23\left(x-3\right)
The opposite of -6 is 6.
3x^{2}-7x+6-23\left(x-3\right)
Combine -6x and -x to get -7x.
3x^{2}-7x+6-23x+69
Use the distributive property to multiply -23 by x-3.
3x^{2}-30x+6+69
Combine -7x and -23x to get -30x.
3x^{2}-30x+75
Add 6 and 69 to get 75.
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}