Question

Factorise the following
A^2-(2a+3b)^2

Answer 1

your answers please check

Answer 2

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