`ax+ay+az+bx+by+bz`

Factorise : ax + ay + bx + by

The planes bx - ay = n, cy - bz = I, az - cx= m intersect in a line if

If the system of equations bx + ay = c, cx + az = b, cy + bz = a has a unique solution, then

If the system of equations bx + ay = c, cx + az = b, cy + bz = a has a unique solution, then

If x ^(2) + y ^(2) + z ^(2)ne 0, x= cy + bz, y= az +cx, and z= bx + ay, a ^(2) + b ^(2) + c ^(2) + 2 abc is equal to

Factorise: ax - bx+ ay- by