求化简 y=(x-5)(100-7(x-7))急
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求化简y=(x-5)(100-7(x-7))急求化简y=(x-5)(100-7(x-7))急求化简y=(x-5)(100-7(x-7))急y=(x-5)(149-7x)=149x-7x^2-745+3
求化简 y=(x-5)(100-7(x-7))急
求化简 y=(x-5)(100-7(x-7))急
求化简 y=(x-5)(100-7(x-7))急
y=(x-5)(149-7x)
=149x-7x^2-745+35x
=-7x^2+184x-745
(x-5)(100-7(x-7))=y 求化简
求化简 y=(x-5)(100-7(x-7))
求化简 y=(x-5)(100-7(x-7))急
求化简 y=(x-5)(100-7(x-7))快点嘛
求化简 y=(x-5)(100-7(x-7))帮帮忙啦
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
2(6X方+X)方-11(6X方+X)+5X四次方-10X方+9X三次方-7X方+12X(X+Y)方+2(X+Y)-15A四次方-21A方-100(X方+X)方-14(X方+X)+24X方(X-1)-Y方(X-1)
-(5x+y)-7(x-y) -2分之1(x+y)+4分之1(x+2y) 4x-2(x-2) -2x-(3x-1) x-(5x-2y)+2(2x-y)
已知X=11Y,(X-2)*3=Y,(X-4)*5=Y,(X-6)*7=Y,(X-8)*9=Y ,求X、Y各是多少?
若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
5x=y,那么x,y成( )比例
4x+8y=5(x+y)
(x-y)^7除以(y-x)^5=?
(x+5y)(x-7y-1)
1.5(x+y)+3(x-y)=27(x+y)-3(x-y)=-62.x-y/7 - x+y/10 =1/22(x-y)-5(x+y)=3所谓细节决定成败,
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
把x-y,合并同类项:5(x-y)+3(x-y)-7(x-y)=
把x-y看成一个整体,合并同类项:5(x-y)+3(x-y)-7(x-y)