Question

answer fast please. make you brainest and follow you ​

Answer 1

Step-by-step explanation:

i) (2x+6y+7z)+(-7 x-8y+3z)+(x-3y-10z)

2x+6y+7z+-7 x-8y+3z+x-3y-10z

(2x-7x)+(6y-8y)+(7z+3z-10z)

-5x-2y+0z

ii) 20,16,12

20^2=12^2+16^2

400=144+256

400=400

Hence, it is pythagorean triplet.

Please mark brainliest