Evaluate
\frac{2\left(4-x-3x^{2}\right)}{x^{4}-2x^{3}-9x^{2}+10x+21}
Expand
-\frac{2\left(3x^{2}+x-4\right)}{x^{4}-2x^{3}-9x^{2}+10x+21}
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\frac{-6x^{2}-2x+8}{x^{4}-2x^{3}-9x^{2}+10x+21}
Combine x^{2} and -7x^{2} to get -6x^{2}.
\frac{-6x^{2}-2x+8}{x^{4}-2x^{3}-9x^{2}+10x+21}
Combine x^{2} and -7x^{2} to get -6x^{2}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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 ) }
Integration
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Limits
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