Question

a square plus b square formulae..??​

Answer 1

A+B)² = A²+B² +2AB

And

(A-B)² = A²+B² -2AB

Hence,

A²+B² = (A-B)²+ 2AB

Or

A²+B² = (A+B)² - 2AB

Answer 2

a

${a \: }^{2} + b {}^{2} = a {}^{2} + 2ab + b {}^{2}$

there u go!!!!