Question

9-a²+2ab-b² factorise it

Answer 1

9 - a² + 2ab - b²

-1 [ -9 + a² - 2ab + b²]

-1 [ -9 + (a - b)²]

9 - (a - b)²

3² - (a - b)²

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


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I hope this will help you



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Answer 2

9 - a² + 2ab - b²
=> 3² - ( a² - 2ab + b²)
=> 3² - (a-b)²
=> ( 3- a +b) (3+a-b)

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