Question

I will mark ur ans as brainliest, if u ans correctly
Q. Simplify.
1) ( x+2y+3z)^2+(x-2y-3z)^2
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Answer 1

Answer:

2(x²+4y²+9z²+6yz)

Step-by-step explanation:

(x+2y+3z)²+(x-2y-3z)²

=x²+4y²+9z²+2xy+3xz+6yz+x²+4y²+9z²-2xy-3zx+6yz

=2(x²+4y²+9z²+6yz)

i hope this is the correct answer