Question

solve x square - 4 x y + Y square

Answer 1

x²-4xy+y² is in the formula "a²-4ab+b²=(a+b)²
x²-4xy+y²=(x+y)²

Answer 2

${x}^{2} - 4xy + {y}^{2}$
$x = \frac{4y \frac{ + }{ - } \sqrt{16 {y}^{2} - 4 {y}^{2} } }{2}$
$\frac{4y \frac{ + }{ - } y\sqrt{12} }{2}$