Evaluate
55
Factor
5\times 11
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99-2-3-4-5-6-7-8-9
Subtract 1 from 100 to get 99.
97-3-4-5-6-7-8-9
Subtract 2 from 99 to get 97.
94-4-5-6-7-8-9
Subtract 3 from 97 to get 94.
90-5-6-7-8-9
Subtract 4 from 94 to get 90.
85-6-7-8-9
Subtract 5 from 90 to get 85.
79-7-8-9
Subtract 6 from 85 to get 79.
72-8-9
Subtract 7 from 79 to get 72.
64-9
Subtract 8 from 72 to get 64.
55
Subtract 9 from 64 to get 55.
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}