化简:a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位
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化简:a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位
化简:a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位
化简:a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位
a(a*a-1)+2a*a(a+1)-3a(2a-5) =a^3-a+2a^3+2a^2-6a^2+15a =3a^3-4a^2+14a =a(3a^2-4a+14)
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