Question

find the identity of x^2+y^2 =?

Answer 1

Heyaa☺

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Given,

x^2 + y^2 =

Applied identity is a^2 + b^2

=》 a^2 + b^2 + 2ab.

➡x^2 + y^2 + 2 xy.

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Hope you understand..✌

Answer 2

(X+Y)^2 = x^2 + Y^2 +2 XY

X^2+Y^2 =(X+Y)^2- 2XY