Question

( a - b + c )^2 expand ?

Answer 1

Identity used→(a - b)² = a² + b² - 2ab

(a - b + c)²

[(a - b) + c]²

(a - b)² + c² + 2*c*(a - b)

a² + b² - 2ab + c² + 2ac - 2bc

a² + b² + c² + 2ac - 2bc - 2ab