Ответ:
a)6b+4+3b^2+2b= 8b+4+3b^2
б)10b+15b^2-2b^2-3b^3 = 10b+10b^2
в)6-10b+3b+5b^2=6-2b
г)-6b^2+15b-8b+20=-6b^2+7b+20
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Ответ:
a)6b+4+3b^2+2b= 8b+4+3b^2
б)10b+15b^2-2b^2-3b^3 = 10b+10b^2
в)6-10b+3b+5b^2=6-2b
г)-6b^2+15b-8b+20=-6b^2+7b+20