Question

Factorise : 9a^2b^2 - 21ab + 10
pls asap ​

Answer 1

$\huge \pink {answer}$

• 9a2b2 – 25 can be written as (3ab)2 – (5)2
• By using the formula a2 – b2 = (a+b) (a-b)
• Now solving for the above equation

(3ab)2 – (5)2 = (3ab+5) (3ab-5)