3x232x13y22x23y其中x13y23代入可得3×1/9+(-3/2×(-1/3)+1/3×4/9)×(2×(-1/3)-2/3×2/3)=1/3+(1/2+4/27)×(-2/3-4/9)=1/3+27/54×(-10/9)=1/3-350/486=-188/486=-31/812,若a322b322求a方bab方的值a方b-ab方=ab(a-b)=(3+2√2)(3-2√2)(3+2√2-3+2√2)=(9-8)x4√2=4√2您好,答题不易如有帮助请采纳,谢谢解:a2b-ab2=ab(a