Question

Expand: (3 a- 7b –c )2​

Answer 1

Answer:

the answer is in the attachment

Step-by-step explanation:

plz find the attachment. the answer is in there. I would like if you would mark my answer as brainliest. thankyou.

Answer 2

Answer:

using identies it can be easily solved...

Step-by-step explanation:

(3a-7b-c)²

=[3a-(7b+c)]²

=9a²-2.3a(7b+c)+(7b+c)²

=9a²-42ab-6ac+49b²+2.7b.c+c²

=9a²+49b²+c²-42ab-6ac+14bc

hope it hepled you a lot:)