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1.làm tính nhân -3x. (x^2+7x-1/3)
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1.làm tính nhân
-3x. (x^2+7x-1/3)

User Andy Jones
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- 3x( {x}^(2) ) \: + \: - 3(7x) \: - \: - 3x( - (1)/(3) ) \\ = { - 3x}^(3) \: + \: - 21x \: - \: (3)/( 3) \\ \bf{= {- 3x}^(3) \: + \: - 21x \: - \: 1}

User Tim Bielawa
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