Expand
20x^{2}+21x-27
Evaluate
\left(4x-3\right)\left(5x+9\right)
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20x^{2}+36x-15x-27
Apply the distributive property by multiplying each term of 4x-3 by each term of 5x+9.
20x^{2}+21x-27
Combine 36x and -15x to get 21x.
20x^{2}+36x-15x-27
Apply the distributive property by multiplying each term of 4x-3 by each term of 5x+9.
20x^{2}+21x-27
Combine 36x and -15x to get 21x.
Examples
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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
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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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