Question

bracket X + Y bracket square - 4 x y​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

$(x - y) {}^{2}$

Step-by-step explanation:

$\: \: \: \: (x + y) {}^{2} - 4xy \: \\ = {x}^{2} + {y}^{2} + 2xy - 4xy\\ = {x}^{2} + {y}^{2} - 2xy \\ = (x - y) {}^{2}$