Q5 of 95 Page 87

Find each of the following products:

(7x + 2y) × (x + 4y)

By using horizontal method,


We have;


= (7x + 2y) × (x + 4y)


= 7x(x +4y) + 2y(x + 4y)


= 7x2 + 28xy + 2xy + 8y2


= 7x2 + 30xy + 8y2


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