Question

The value of (x+y)(x-y) (a)X2+2xy+y2 (b)x+2xy+y (c) x2-2xy+y2 (d) x2-y2
​

Answer 1

$\huge\color{pink}\boxed{\colorbox{Black}{❥ Answer}}$

x

2

−2xy+y

2

)−z

2

⇒[x(x−y)−y(x−y)]−z

2

⇒(x−y)(x−y)−z

2

⇒(x−y)

2

−z

2

⇒[(x−y)+z][(x−y)−z]

⇒(x−y+z)(x−y−z)