Question

Factorise the following - 4a^2 - 12ab +9b^2

Answer 1

$= > {4a}^{2} - 12ab + {9b}^{2} \\ = > {(2a)}^{2} - 2 \times 2a \times 3b + {(3b)}^{2} \\ = > {(2a - 3b)}^{2}$