Evaluate
\left(x+4y\right)\left(x+7y\right)
Expand
x^{2}+11xy+28y^{2}
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x^{2}+4xy+7yx+28y^{2}
Apply the distributive property by multiplying each term of x+7y by each term of x+4y.
x^{2}+11xy+28y^{2}
Combine 4xy and 7yx to get 11xy.
x^{2}+4xy+7yx+28y^{2}
Apply the distributive property by multiplying each term of x+7y by each term of x+4y.
x^{2}+11xy+28y^{2}
Combine 4xy and 7yx to get 11xy.
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