(1)-a^3+2a^2-a(2)4xy^2-4x^2y-y^3
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(1)-a^3+2a^2-a(2)4xy^2-4x^2y-y^3
(1)-a^3+2a^2-a(2)4xy^2-4x^2y-y^3
(1)-a^3+2a^2-a(2)4xy^2-4x^2y-y^3
-a^3+2a^2-a
=-a(a^2-2a+1)
=-a(a-1)^2
4xy^2-4x^2y-y^3
=y(4xy-4x^2-y^2)
=-y(4x^2-4xy+y^2)
=-y(2x-y)^2
计算:3xy-4xy-(-2xy)3xy-4xy-(-2xy)-1/3ab-1/4a²+1/3a²-(-2/3ab)
(a^2-3a+2)x^2+(2a^2-4a+1)xy+(a^2-a)y因式分解
(-3a^2b^3)^2*(-a^3b^2)^5(-4xy^3)*(-xy)+(-3xy^2)^2
已知A=5x^2y-3xy^2+4xy,B=7xy^2-2xy+x^2y.①求A-2B;②求-1/2(A+B)-A.
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设A=x-xy,B=xy+y²,求:(1)A+B(2)3A-B
⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1 ⒉1/2ab-5⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1先化简,再求值⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1⒉1/2ab-5aC-(3ac b)+(3aC-4a C),其中a=-1,b=2,C=-2
计算:3a(a²-2a+1)-2a²(a-3) (2x-3y)(x+y)(-3/1a²b)²*(-3ab²)的4次方3a(a²-2a+1)-2a²(a-3)-2xy²*(-3x²y)-xy(6x²y²-x²y+xy²)
初一上册数学化简计算化简求过程:(1)(4a²b-10b³)+(-3a²b²+10b³) (2) (4x²y-5xy²)-(3xy²-4xy²) (3) 5a²-[ a²+(5a²-2a)-2(a²-3a)] (4) 15+3(1-a)-(1-a-a
(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/101题抄错了,是(a^2-2a+1)/(1-a)1题抄错了,是(a^2-2a+1)/(1-a)5灭错啊
xy>0,x不等于y,比较loga(3x^2+4xy+y^2)与loga(2x^2+6xy)大小.(a不等于1,a>0)
计算:(-3/4a²)³.(4/3a³)² 计算:(-1/2xy²)²(3xy-4xy²+1)
计算:① -3(2x²-xy)-4(x²-xy-6) ②5a²-[(5a²-2a)-2(a²-3a)]
已知a=5x^2-3xy^2+4xy,b=3xy^2-2xy+x^2y,则a-b=【】
因式分解:3/4a^2x^2-9a^2xy+27a^2y^2
已知A=5x²y-3xy²+4xy;B=7xy²-2xy+x²y,且x+y=2,x-y=0,化简求-1/2(A+B)-A.
4a^3-8a^2+4a 因式分解 x^5-xy^4