Evaluate
2\left(4x-7y\right)\left(2x+y\right)
Expand
16x^{2}-20xy-14y^{2}
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16x^{2}-28xy+8yx-14y^{2}
Apply the distributive property by multiplying each term of 4x+2y by each term of 4x-7y.
16x^{2}-20xy-14y^{2}
Combine -28xy and 8yx to get -20xy.
16x^{2}-28xy+8yx-14y^{2}
Apply the distributive property by multiplying each term of 4x+2y by each term of 4x-7y.
16x^{2}-20xy-14y^{2}
Combine -28xy and 8yx to get -20xy.
Examples
Quadratic equation
{ 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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