Factor
7\left(x+y\right)^{2}
Evaluate
7\left(x+y\right)^{2}
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7\left(x^{2}+2xy+y^{2}\right)
Factor out 7.
\left(x+y\right)^{2}
Consider x^{2}+2xy+y^{2}. Use the perfect square formula, a^{2}+2ab+b^{2}=\left(a+b\right)^{2}, where a=x and b=y.
7\left(x+y\right)^{2}
Rewrite the complete factored expression.
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