Question

$9 {x}^{2} - {a -}^{2} - 2ab - {b}^{2}$
factorise
Please answer fast it is of 25point and if i get correct answer then I will mark your answer as Brainliest ​

Answer 1

Answer:

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

Step-by-step explanation:

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

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

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