分解因式:-3a²b+6ab²-3ab=-3ab(?).-4a²+b²=(?)(2a+b)
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分解因式:-3a²b+6ab²-3ab=-3ab(?).-4a²+b²=(?)(2a+b)
分解因式:-3a²b+6ab²-3ab=-3ab(?).-4a²+b²=(?)(2a+b)
分解因式:-3a²b+6ab²-3ab=-3ab(?).-4a²+b²=(?)(2a+b)
-3a²b+6ab²-3ab=-3ab(a-2b+1)
-4a²+b²=(b-2a)(2a+b)
-3a²b+6ab²-3ab=-3ab(a-2b+1).
-4a²+b²=(b-2a)(2a+b)