Consider the equation of plane, P:(2x+3y+z+20)+λ(x−3y+5z−8)=0 P:(2+λ)x+3(3−3λ)y+1(1+5λ)z+(20−8λ)=0 ∵ Plane P is perpendicular to 2x+3y+z+20=0 So, 4+2λ+9−9λ+1+5λ=0 ⇒λ=7 P:9x−18y+36z−36=0 or P:x−2y+4z=4 If image of (2,−‌