Find each of the following products:
(2x2 – 5y2) × (x2 + 3y2)
By using horizontal method,
We have;
= (2x2 – 5y2) × (x2 + 3y2)
= 2x2(x2 + 3y2) – 5y2(x2 + 3y2)
= 2x4 + 6x2y2 – 5x2y2 – 15y4
= 2x4 + x2y2 – 15y4