Question

Factorise : 9-y²+2xy-x²​

Answer 1

Step-by-step explanation:

9-(x²-2xy+y²)

9-(x-y)²

3²-(x-y)²

this is in the form a²-b²

so the factors are (3+x-y) (3-x+y)

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Answer 2

Step-by-step explanation:

it is help for u

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