Question

question no 27. 9-a²+2ab-b²?factories ​

Answer 1

Answer:

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

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

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

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

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

Answer 2

27. 9 - a² + 2ab - b²

=> (3)² - (a² + 2ab + b²)

=> (3)² - (a+b)²

=> (3+a+b) (3-a-b) ........ (ans)