Evaluate
\left(2x-7\right)\left(x+3\right)
Expand
2x^{2}-x-21
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2x^{2}+6x-7\left(x+3\right)
Use the distributive property to multiply 2x by x+3.
2x^{2}+6x-7x-21
Use the distributive property to multiply -7 by x+3.
2x^{2}-x-21
Combine 6x and -7x to get -x.
2x^{2}+6x-7\left(x+3\right)
Use the distributive property to multiply 2x by x+3.
2x^{2}+6x-7x-21
Use the distributive property to multiply -7 by x+3.
2x^{2}-x-21
Combine 6x and -7x to get -x.
Examples
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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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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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