`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

Factorise: ax - bx+ ay- by

If a !=b , then the system of equation ax + by + bz = 0 bx + ay + bz = 0 and bx + by + az = 0 will have a non-trivial solution, if