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Question
Multiply: (1 + 6x2 - 4x3)(-1 + 3x - 3x2)
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Solution
(1 + 6x2 - 4x3)(-1 + 3x - 3x2)
⇒ 1(- 1 + 3x - 3x2) + 6x2 (- 1 + 3x - 3x2) - 4x3 (- 1 + 3x - 3x2)
⇒ - 1 + 3x - 3x2 - 6x2 + 18x3 - 18x4 + 4x3 - 12x4 + 12x5
⇒ - 1 + 3x - 9x2 + 22x3 - 30x4 + 12x5
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