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a>ab>ab2 ab2>ab>a ab>a>ab2 ab>ab2>a
a>ab>ab2 ab2>ab>a ab>a>ab2 ab>ab2>a
3AB2+B2====2C 2AB+2B2====2C 2AB+B2====2C AB2+2B2====2C
a+2a2=3a3 (a+b)2=a2+ab+b2 2(a﹣b)=2a﹣2b (2ab)2÷(ab)=2ab(ab≠0)
,则A.的值为( ). A.2ab -ab 4ab -4ab
A2+3B22AB3 2AB2+B.22AB3 2A2B+5B2 =4AB3 2AB2+B.2 = 2AB3
a>ab>ab2 ab>ab2>a ab>a>ab2 ab<a<ab2
a>ab>ab2 ab2>ab>a ab>a>ab2 ab>ab2>a
a2-2ab+b2=(a-b)2 (a+b)2=a2+2ab+b2 a2b+ab2+c=ab(a+b)+c a2-2ab+b2-c=(a-b)2-c
(AB/2)^(1/2) (2/AB)^(1/2) (AB/2) ² (2/AB) ²
a2+2ab-b2 a2b-2ab+ab=2 4(a+b)2-20(a+b)2+25 -2a2+4ab+2b2
a2-2ab a2-2ab-3b2 a2-2ab+b2 a2-2ab+2b2