Question

wats a^2+b^2 formula????

Answer 1

\[(a + b)^{2} = a ^{2} +b ^{2} + 2ab\]
\[Therefore, a ^{2} +b ^{2} = a ^{2} +b ^{2} + 2ab - 2ab = (a + b)^{2} - 2ab\]

Answer 2

\[(a+b)^2=a^2+b^2+2ab\]
\[(a+b)^2-2ab=a^2+b^2\]

\[(a-b)^2=a^2+b^2-2ab\]
\[(a-b)^2+2ab=a^2+b^2\]