Find each of the following products:
(x2 – 5x + 8) × (x2 + 2)
By using horizontal method,
We have;
= (x2 – 5x + 8) × (x2 + 2)
= x2(x2 – 5x + 8) + 2(x2 – 5x + 8)
= x4 – 5x3 + 8x2 + 2x2 – 10x + 16
= x4 – 5x3 + 10x2 – 10x +16