Question

(a2+b2)= __________;;–

Answer 1

a²+b²=a²+b²+2ab

Means

(a²+b²) =(a+b) ²

Hope its Help you!!

Answer 2

${a}^{2} + {b}^{2} = (a+b)^{2}-2ab$
OR
$({a}+{b})^{2}=(a-b)^{2}+ {2ab}$