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Question
Multiply: 2y − 4y3 + 6y5 by y2 + y − 3
Solution
2y − 4y3 + 6y5
× y2 + y − 3
2y3 − 4y5 + 6y7
+ 2y2 − 4y4 + 6y6
− 6y + 12y3 − 18y5
6y7 + 6y6 −(4+18)y5 − 4y4 + (2+12)y3 + 2y2 − 6y
= 6y7 + 6y6 − 22y5 − 4y4 + 14y3 + 2y2 − 6y
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