Evaluate
\left(x+4y\right)\left(2x+y\right)
Expand
2x^{2}+9xy+4y^{2}
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2x^{2}+8xy+yx+4y^{2}
Apply the distributive property by multiplying each term of 2x+y by each term of x+4y.
2x^{2}+9xy+4y^{2}
Combine 8xy and yx to get 9xy.
2x^{2}+8xy+yx+4y^{2}
Apply the distributive property by multiplying each term of 2x+y by each term of x+4y.
2x^{2}+9xy+4y^{2}
Combine 8xy and yx to get 9xy.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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