化简 ﹣2(m+n-2a),ab-2(3ab-1)
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化简 ﹣2(m+n-2a),ab-2(3ab-1)
化简 ﹣2(m+n-2a),ab-2(3ab-1)
化简 ﹣2(m+n-2a),ab-2(3ab-1)
﹣2(m+n-2a)
=-2m-2n+4a
ab-2(3ab-1)
=ab-6ab+2
=-5ab+2
化简 ﹣2(m+n-2a),ab-2(3ab-1)
分解因式:(m-n)^3+(m-n)^2 a^3-2a^2b+ab^2
化简:① a²-3ab+4b²-(2b²-3ab-3a²) ② m-{3n-4m+【m-5(m-n)+m}
化简:① a²-3ab+4b²-(2b²-3ab-3a²) ② m-{3n-4m+【m-5(m-n)+m}
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