Evaluate
\frac{21}{20}=1.05
Factor
\frac{3 \cdot 7}{2 ^ {2} \cdot 5} = 1\frac{1}{20} = 1.05
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\frac{3}{4}\times \frac{7}{5}
Divide \frac{3}{4} by \frac{5}{7} by multiplying \frac{3}{4} by the reciprocal of \frac{5}{7}.
\frac{3\times 7}{4\times 5}
Multiply \frac{3}{4} times \frac{7}{5} by multiplying numerator times numerator and denominator times denominator.
\frac{21}{20}
Do the multiplications in the fraction \frac{3\times 7}{4\times 5}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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}