Question

factorise 18a²x² -32​

Answer 1

$18 {a}^{2}{x}^{2} - 32 \\ \\ = 2(9 {a}^{2} {x}^{2} - 16) \\ \\ = 2 \: [ ({3ax)}^{2} - ( {4)}^{2}] \\ \\ = 2(3ax + 4)(3ax - 4)$