Evaluate
2\left(2v-7\right)\left(v+2\right)
Expand
4v^{2}-6v-28
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4v^{2}+8v-14v-28
Apply the distributive property by multiplying each term of 2v-7 by each term of 2v+4.
4v^{2}-6v-28
Combine 8v and -14v to get -6v.
4v^{2}+8v-14v-28
Apply the distributive property by multiplying each term of 2v-7 by each term of 2v+4.
4v^{2}-6v-28
Combine 8v and -14v to get -6v.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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