Math
posted by yoshii .
find the distance between M(1; 0; 3) point and 2x2y+z+7=0 plane

If (a,b,c) is any point, then its distance to
Ax + By +Cz + D =0 is
Aa + Bb + Cc + D/√(A^2 + B^2 + C^2)
= 2(1)  2(0) + 1(3) + 7/√(1 + 0 + 9)
= 6/√10
or
= 6√10/10 = 3√10/5