帮忙做下(2a+1)(3a+1)—3a(2-3)对不起,我输错了,是(2a+1)(3a-1)—3a(2-3)
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帮忙做下(2a+1)(3a+1)—3a(2-3)对不起,我输错了,是(2a+1)(3a-1)—3a(2-3)
帮忙做下(2a+1)(3a+1)—3a(2-3)
对不起,我输错了,是
(2a+1)(3a-1)—3a(2-3)
帮忙做下(2a+1)(3a+1)—3a(2-3)对不起,我输错了,是(2a+1)(3a-1)—3a(2-3)
6a^2+8a+1
(2a+1)(3a+1)-3a(2-3)
=6a2次方+2a+3a+1+3a
=6a2次方+8a+1
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