Question

expand (-2a-b-3c)² plz urgent​

Answer 1

Step-by-step explanation:

4a^2 + b^2 + 9c^2 + 2(2ab+3cb+6ac)...(Using the expansion of (a+b+c)^2 )

4a^2 + b^2 + 9c^2 + 4ab + 6cb + 12ac