Question

find the product: (1-x+y)×(1+x+y)​

Answer 1

Answer:

Take (y + 1) as n.

(1-x+y)×(1+x+y)​

= (n + x) (n - x)

= n^2 - x^2

= (y + 1)^2 - x^2

= y^2 + 2y + 1 - x^2

Answer 2

Answer:

1 + 2y - x² + 2xy + y²

Step-by-step explanation:

  (1-x+y) × (1+x+y)​

= (1×1) - (x×1) + (y×1)  + (x×1) - (x×x)+ (x×y) + (y×1) - (y×x) + (y×y)

= 1 - x + y + x - x² + xy + y + xy+ y²

= 1 + 2y - x² + 2xy + y²

Hope it helps,

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