Related Post: 3 4 X 2 5 X 1 3 X 4 2 5 X 4 )= 12 3 X 4 2 5 X 4 )= 12 Factorise X 3 4x 2 5 X 1 3 4 X )- 5x 2 X 1 3 X 2 4 X 5 10 3 4 X 1 2 X 5 8 3 X 4 )+ 2 5x 10 2x 3 4 X 2 X 1 5 Derivative 5 X 3 )- 4 X 2 )= 15