Question

solve the question 3 (1) part
Please do fast

Answer 1

question no 3 anwer   (a + b - c)2 = a2 + b2 + c2 + 2ab – 2bc - 2ca

question no 1 anwer  (- b - c+a)2 = a2 + b2 + c2 – 2ab + 2bc – 2ca

 question no 2 anwer   (a  + c - b )2 = a2 + b2 + c2 – 2ab – 2bc + 2ca