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


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