Evaluate
\frac{4}{245}\approx 0.016326531
Factor
\frac{2 ^ {2}}{5 \cdot 7 ^ {2}} = 0.0163265306122449
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\frac{4}{5}\times \frac{1}{49}
Calculate \frac{1}{7} to the power of 2 and get \frac{1}{49}.
\frac{4\times 1}{5\times 49}
Multiply \frac{4}{5} times \frac{1}{49} by multiplying numerator times numerator and denominator times denominator.
\frac{4}{245}
Do the multiplications in the fraction \frac{4\times 1}{5\times 49}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
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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}