(3x+1)(x+2) 化简
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(3x+1)(x+2)化简(3x+1)(x+2)化简(3x+1)(x+2)化简(3x+1)(x+2)=3x(x+2)+(x+2)=3x²+6x+x+2=3x²+7x+2
(3x+1)(x+2) 化简
(3x+1)(x+2) 化简
(3x+1)(x+2) 化简
(3x+1)(x+2)
=3x(x+2)+(x+2)
=3x²+6x+x+2
=3x²+7x+2
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