Question

Expand the following with the help of suitable identities : (2a-3b-c)²

Answer 1

The above pic is the answer...plz follow it...Gud luck...

Answer 2

Answer:

${(2a - 3b - c)}^{2} \\ the \: identity \: used \: here \: is \\ {(a - b - c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} 2ab + 2bc - 2ca \\ hope \: it \: helps \: you$