分解因式a²-3a-ab+3b
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分解因式a²-3a-ab+3b
分解因式a²-3a-ab+3b
分解因式a²-3a-ab+3b
原式=a(a-3)-b(a-3)
=(a-3)(a-b)
a²-3a-ab+3b
=a(a-3)-b(a-3)
=(a-3)(a-b)
a²-3a-ab+3b
=a²-ab+3b-3a
=a(a-b)-3(a-b)
=(a-3)(a-b)
a²-3a-ab+3b
=a²-ab+3b-3a
=a(a-b)-3(a-b)
=(a-3)(a-b)
a^2-3a-ab+3b
=a(a-3)-b(a-3)
=(a-b)(a-3)