Evaluate
\left(x+7\right)\left(3x^{2}-1\right)
Expand
3x^{3}+21x^{2}-x-7
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3x^{3}+21x^{2}-\left(x+7\right)
Use the distributive property to multiply 3x^{2} by x+7.
3x^{3}+21x^{2}-x-7
To find the opposite of x+7, find the opposite of each term.
3x^{3}+21x^{2}-\left(x+7\right)
Use the distributive property to multiply 3x^{2} by x+7.
3x^{3}+21x^{2}-x-7
To find the opposite of x+7, find the opposite of each term.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
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Simultaneous equation
\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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