Question

Factorise 9-a2-2ab-b2

Answer 1

Step-by-step explanation:

9-(a)²-2ab-(b)²

9-(a²+2ab+b²)

9-(a+b)²

(3)²-(a+b)²

(3-a-b)(3+a+b)

hope this helps you

Answer 2

Answer:

(3-a+b)(3+a-b)

Step-by-step explanation:

9-a^2+2ab-b^2

= 9-(a^2+2ab-b^2)

= (3)^2-(a-b)^2

= (3-a+b)(3+a-b)

Hope it helps you

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