①ab^2- ab(b-a)+(-2a)^2 ·x②1/3 x(-x^2 +2x-1 )-1/3x^2(2x-6x^2)
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①ab^2- ab(b-a)+(-2a)^2 ·x②1/3 x(-x^2 +2x-1 )-1/3x^2(2x-6x^2)
①ab^2- ab(b-a)+(-2a)^2 ·x
②1/3 x(-x^2 +2x-1 )-1/3x^2(2x-6x^2)
①ab^2- ab(b-a)+(-2a)^2 ·x②1/3 x(-x^2 +2x-1 )-1/3x^2(2x-6x^2)
①ab^2- ab(b-a)+(-2a)^2 ·x
=ab^2-ab^2-a^2b+4a^2X
=-a^2b+4a^2X
②1/3 x(-x^2 +2x-1 )-1/3x^2(2x-6x^2)
=-1/3x^3+2/3x^2-1/3x-2/3x^3+2x^4
=2x^4-x^3+2/3x^2-1/3x
a+b/2ab
2AB/A+B
a+b/2ab
(a+ab)-[(ab-2b)-a]-(-9ab),其中a+b=-7,ab=3.
[(a^2-2ab)/-ab+b^2]/[(a/a+b)/(2ab/2b-a)]
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
b/(a^2-ab)+c/(b^2-ab)+(a+b^2)/(a^2b-ab^2)
(a-b)^2/ab-(a^2-b^2)/ab
(a+b-2ab)(a+b-2)+(1-ab)^2
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
(a-b)平方-2ab(b-a)
(a-b)^3+2ab(a-b)
a>2,b>2ab
b/a^2-ab,a/b^2-ab,ab/a^2-b^2通分
ab/a+b=3 a-2ab+b/2a-3ab+2b?
因式分解:a×a×a-2a×a×b+ab×b
3(-2ab+3a)-(2a-b)+6ab