Question

factorise a(a+b-c) -bc

Answer 1

$a(a+b-c) -bc = {a}^{2} + ab - ac - bc$

Answer 2

a(a+b-c)-bc a^2+ab-ac-bc (a^2+ab)-(ac+bc) a(a+b)-c(a+b) (a+b) (a-c)