Prove that the plane `2x+3y-4z=9` is perpendicular to each of the planes `x+2y+2z-7=0`
Channel: Doubtnut
Date: 2020-04-12

Prove that the plane `2x+3y-4z=9` is perpendicular to each of the planes `x+2y+2z-7=0` and `5x+6y+7z=23`.