Question

$(x + y) }^{2} + (x - y)^{2}$
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Answer 1

Answer:

here it is

Step-by-step explanation:

a^2 - b^2 = (a + b) * (a - b)

(x + y)^2 - (x - y)^2 = (x + y + x - y) * (x + y - x + y) =2x*2y

=4xy                                        

therefore, (x + y)^2 - (x - y)^2 = 4xy.

hope it helps you