Question

The value of (x + y) (x + y) + (y – z) (y + z) + (z – x) (z + x) is equal to
(A) 3x²
(B) 3y²
(C) 3z²
(D) 0​

Answer 1

Answer:

A 3x² is the correct answer

Answer 2

Answer:

if in the question the first term is (x+y)(x-y)

then option D is correct