Evaluate
9x^{2}+20091
Factor
3\left(3x^{2}+6697\right)
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20091+9x^{2}
Subtract 78 from 20169 to get 20091.
3\left(6697+3x^{2}\right)
Factor out 3. Polynomial 3x^{2}+6697 is not factored since it does not have any rational roots.
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{ x } ^ { 2 } - 4 x - 5 = 0
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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.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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