Question

Write the formula (a2+b2)

Answer 1

(a + b )² = a² + b² + 2ab

also,

(a - b )² = a² + b² - 2ab

a² + b² = (a + b )² -/+ 2ab

Answer 2

a2+b2= (a+b)^2 -2 ab
or (a-b)^2 +2ab