Question

(x + y + z)(x + y - z)
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Answer 1

(x + y + z)(x + y - z)

= [ (x + y) + ( z)] [ (x + y )- (z) ]

= (x+y)² - z²

= x² + y² +2xy -z²

Answer 2

Answer:

heya mate..

(x+y+z) (x+y-z)

= x^2 + xy - xz + xy + y^2 - yz + xz + yz - z^2

= x^2 + 2xy + y^2 - z^2

hope it helps u