Be the first to answer - "What is the formula of x2+y2?"

mishikizovw8

Answered question

2022-12-11

What is the formula of

x^{2} + y^{2}

pepulutcm1

Beginner2022-12-12Added 1 answers

From

{(x + y)}^{2} = x^{2} + y^{2} + 2 x y

{(x + y)}^{2} = x^{2} + y^{2} + 2 x y \Rightarrow x^{2} + y^{2} = {(x + y)}^{2} - 2 x y

Also, From

(^{x - y) 2} = x^{2} + y^{2} - 2 x y

{(x - y)}^{2} = x^{2} + y^{2} - 2 x y \Rightarrow x^{2} + y^{2} = {(x - y)}^{2} + 2 x y

x^{2} + y^{2} = {(x + y)}^{2} - 2 x y

x^{2} + y^{2} = {(x - y)}^{2} + 2 x y

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