x2 + y2 – z2 + 2xy= x2 + y2 + 2xy – z2= (x +y)2 – z2 = (x + y + z) (x + y – z)= (b + c– 2a + c + a – 2b + a + b – 2c) (x + y– z) = 0
Previous Question Next Question
Your comments will be displayed only after manual approval.
