Question

(1) 9 - x2 + 2xy – y2
FACTORISE IT​

Answer 1

Answer:

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)

Step-by-step explanation: