Question

Expand : (-a - b/3 + 3c)²​

Answer 1

Step-by-step explanation:

(a−2b−3c)2

According to the equation ,

(a+b+c)2=a2+b2+c2+2ab+2bc+2ca

So we get,

Using the formula we can it write it as

(a−2b−3c)2=a2+(−2b)2+(−3c)2+2a(−2b)+(2(−2b)(−3c)+2(−3c)a

On further calculation we get,

(a−2b−3c)2=a2+4b2+9c2−4ab+12bc−6ac

Answer 2

Answer is in the following attachment !!!