Evaluate
9\left(a-b\right)
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9a-9b
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4a-3b-\left(-2a\right)-3b+5a-2b-\left(2a+b\right)
To find the opposite of -2a+3b, find the opposite of each term.
4a-3b+2a-3b+5a-2b-\left(2a+b\right)
The opposite of -2a is 2a.
6a-3b-3b+5a-2b-\left(2a+b\right)
Combine 4a and 2a to get 6a.
6a-6b+5a-2b-\left(2a+b\right)
Combine -3b and -3b to get -6b.
11a-6b-2b-\left(2a+b\right)
Combine 6a and 5a to get 11a.
11a-8b-\left(2a+b\right)
Combine -6b and -2b to get -8b.
11a-8b-2a-b
To find the opposite of 2a+b, find the opposite of each term.
9a-8b-b
Combine 11a and -2a to get 9a.
9a-9b
Combine -8b and -b to get -9b.
4a-3b-\left(-2a\right)-3b+5a-2b-\left(2a+b\right)
To find the opposite of -2a+3b, find the opposite of each term.
4a-3b+2a-3b+5a-2b-\left(2a+b\right)
The opposite of -2a is 2a.
6a-3b-3b+5a-2b-\left(2a+b\right)
Combine 4a and 2a to get 6a.
6a-6b+5a-2b-\left(2a+b\right)
Combine -3b and -3b to get -6b.
11a-6b-2b-\left(2a+b\right)
Combine 6a and 5a to get 11a.
11a-8b-\left(2a+b\right)
Combine -6b and -2b to get -8b.
11a-8b-2a-b
To find the opposite of 2a+b, find the opposite of each term.
9a-8b-b
Combine 11a and -2a to get 9a.
9a-9b
Combine -8b and -b to get -9b.
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}