factorise 9(x+a) ^2 - 4x^2

Asked by sayantikasingh3318.9sdatl | 15th May, 2020, 08:25: PM

Expert Answer:

9(x+a)2 - 4x2
 
[3(x+a)]2 - [2x]2
 
Using identity a2 - b2 = (a + b) (a - b). we get
[3(x+a)]2 - [2x]2
= (3x + 3a + 2x) (3x + 3a -2x)
 
 

Answered by  | 15th May, 2020, 09:44: PM