Final answer to the problem
$x^2+y^2+49+2xy-14x-14y$
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1
Apply the formula: $\left(a+b+c\right)^2$$=a^2+b^2+c^2+2ab+2ac+2bc$, where $a=x$, $b=y$ and $c=-7$
$x^2+y^2+{\left(-7\right)}^2+2xy+2\cdot -7x+2\cdot -7y$
Learn how to solve prodotti speciali problems step by step online.
$x^2+y^2+{\left(-7\right)}^2+2xy+2\cdot -7x+2\cdot -7y$
Learn how to solve prodotti speciali problems step by step online. (x+y+-7)^2. Apply the formula: \left(a+b+c\right)^2=a^2+b^2+c^2+2ab+2ac+2bc, where a=x, b=y and c=-7. Apply the formula: ab=ab, where ab=2\cdot -7x, a=2 and b=-7. Apply the formula: ab=ab, where ab=2\cdot -7y, a=2 and b=-7. Apply the formula: a^b=a^b, where a=-7, b=2 and a^b={\left(-7\right)}^2.
Final answer to the problem
$x^2+y^2+49+2xy-14x-14y$
