Question

How do you factor 9a^2b^2 - 4a^2 - 12ab + 4 ?

Answer 1

(3ab-2+2a)(3ab-2-2a)

Explanation:

Given, `9a^2b^2-4a^2-12ab+4`
`rArr 9a^2b^2-12ab+4-4a^2`
`rArr (3ab)^2-2.3ab.2+(2)^2-(2a)^2`
`rArr (3ab-2)^2-(2a)^2`
`rArr [(3ab-2)+2a][(3ab-2)-2a]`
`rArr (3ab-2+2a)(3ab-2-2a)`