Evaluate
3m-5
Expand
3m-5
Share
Copied to clipboard
2m-4+\frac{1}{2}\left(2m-4\right)+1
Combine m and m to get 2m.
2m-4+\frac{1}{2}\times 2m+\frac{1}{2}\left(-4\right)+1
Use the distributive property to multiply \frac{1}{2} by 2m-4.
2m-4+m+\frac{1}{2}\left(-4\right)+1
Cancel out 2 and 2.
2m-4+m+\frac{-4}{2}+1
Multiply \frac{1}{2} and -4 to get \frac{-4}{2}.
2m-4+m-2+1
Divide -4 by 2 to get -2.
3m-4-2+1
Combine 2m and m to get 3m.
3m-6+1
Subtract 2 from -4 to get -6.
3m-5
Add -6 and 1 to get -5.
2m-4+\frac{1}{2}\left(2m-4\right)+1
Combine m and m to get 2m.
2m-4+\frac{1}{2}\times 2m+\frac{1}{2}\left(-4\right)+1
Use the distributive property to multiply \frac{1}{2} by 2m-4.
2m-4+m+\frac{1}{2}\left(-4\right)+1
Cancel out 2 and 2.
2m-4+m+\frac{-4}{2}+1
Multiply \frac{1}{2} and -4 to get \frac{-4}{2}.
2m-4+m-2+1
Divide -4 by 2 to get -2.
3m-4-2+1
Combine 2m and m to get 3m.
3m-6+1
Subtract 2 from -4 to get -6.
3m-5
Add -6 and 1 to get -5.
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}