Question

If anyone will solve all the answers I will mark him/her as the brainliest and follow ....

Answer 1

Answer:

(x-2y-3z)²

=[(x)-(2y+3z)]²

=x²-2x(2y+3z)+(2y+3z)²

=x²-4xy-6xz+4y²+2.2y.3z+9z²

=x²+4y²+9z²-4xy-6xz+12yz

Step-by-step explanation: