Factor
\left(a-3\right)\left(a^{6}+3a^{5}+9a^{4}+27a^{3}+81a^{2}+243a+729\right)
Evaluate
a^{7}-2187
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\left(a-3\right)\left(a^{6}+3a^{5}+9a^{4}+27a^{3}+81a^{2}+243a+729\right)
By Rational Root Theorem, all rational roots of a polynomial are in the form \frac{p}{q}, where p divides the constant term -2187 and q divides the leading coefficient 1. One such root is 3. Factor the polynomial by dividing it by a-3. Polynomial a^{6}+3a^{5}+9a^{4}+27a^{3}+81a^{2}+243a+729 is not factored since it does not have any rational roots.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
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
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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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