Factor
\left(ab-5\right)\left(ab+4\right)
Evaluate
\left(ab-5\right)\left(ab+4\right)
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b^{2}a^{2}-ba-20
Consider a^{2}b^{2}-20-ab as a polynomial over variable a.
\left(ab-5\right)\left(ab+4\right)
Find one factor of the form b^{k}a^{m}+n, where b^{k}a^{m} divides the monomial with the highest power b^{2}a^{2} and n divides the constant factor -20. One such factor is ab-5. Factor the polynomial by dividing it by this factor.
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]
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\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
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Limits
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