Question

9- x² + 2xy - y² factorise it​

Answer 1

Step-by-step explanation:

SOLUTION ✍️

_____________________

x2 - 2xy - y2 + 9 =

-1 • (x2 + 2xy + y2 - 9)

Final result :

-x2 - 2xy - y2 +

hope this helps you!!

Answer 2

Answer:

−x

2

+2xy−y

2

9−x

2

+2xy−y

2

Above terms can be written as ,

9−x

2

+xy+xy−y

2

Now,

9−x

2

+xy+3x−3x+3y−3y+xy−y

2

Rearranging the above terms , we get,

9−3x+3y+3x−x

2

+xy+xy−3y−y

2

Take out common in all terms ,

3(3−x+y)+x(3−x+y)+y(−3−y+x)

3(3−x+y)+x(3−x+y)−y(−3−y+x)

(3−x+y)(3+x−y)

Step-by-step explanation:

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