Find each of the following products:
(9x + 5y) × (4x + 3y)
By using horizontal method,
We have;
= (9x + 5y) × (4x + 3y)
= 9x(4x + 3y) + 5y(4x + 3y)
= 36x2 + 27xy + 20xy + 15y2
= 36x2 + 47xy + 15y2