Evaluate
\left(x-2\right)\left(2x+7\right)
Expand
2x^{2}+3x-14
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\frac{4x^{2}+14x-8x-28}{2}
Apply the distributive property by multiplying each term of 2x-4 by each term of 2x+7.
\frac{4x^{2}+6x-28}{2}
Combine 14x and -8x to get 6x.
-14+3x+2x^{2}
Divide each term of 4x^{2}+6x-28 by 2 to get -14+3x+2x^{2}.
\frac{4x^{2}+14x-8x-28}{2}
Apply the distributive property by multiplying each term of 2x-4 by each term of 2x+7.
\frac{4x^{2}+6x-28}{2}
Combine 14x and -8x to get 6x.
-14+3x+2x^{2}
Divide each term of 4x^{2}+6x-28 by 2 to get -14+3x+2x^{2}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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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