Question

Factorize: $18a^3{b}^3-27a^2{b}^3+36a^3{b}^2$

Answer 1

$18a^3{b}^3-27a^2{b}^3+36a^3{b}^2$

$=9\times 2\times a^2{b}^2\times ab-9\times 3\times a^2{b}^2\times b+9\times 4\times a^2{b}^2\times a$

$=9a^2{b}^2(2ab-3b+4a)$