Evaluate
9.3
Factor
\frac{3 \cdot 31}{2 \cdot 5} = 9\frac{3}{10} = 9.3
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2+0.4+0.4+0.5+1.5+1+1.5+2
Add 1 and 1 to get 2.
2.4+0.4+0.5+1.5+1+1.5+2
Add 2 and 0.4 to get 2.4.
2.8+0.5+1.5+1+1.5+2
Add 2.4 and 0.4 to get 2.8.
3.3+1.5+1+1.5+2
Add 2.8 and 0.5 to get 3.3.
4.8+1+1.5+2
Add 3.3 and 1.5 to get 4.8.
5.8+1.5+2
Add 4.8 and 1 to get 5.8.
7.3+2
Add 5.8 and 1.5 to get 7.3.
9.3
Add 7.3 and 2 to get 9.3.
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}