计算:2a(a-3)^2-6a^2(3-a)+8a(a-3)

计算:2a(a-3)^2-6a^2(3-a)+8a(a-3)
计算:2a(a-3)^2-6a^2(3-a)+8a(a-3)

计算:2a(a-3)^2-6a^2(3-a)+8a(a-3)
原式=2a(a-3)²+6a²(a-3)+8a(a-3)
=2a(a-3)(a-3+3a+8)
=2a(a-3)(4a+5)
=2a(4a²+7a-15)
=8a³+14a²-30a