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如果把分式2yx+y中的x和y都扩大2倍,那么分式的值()A.不变B.缩小2倍C.扩大2倍D.扩大4倍-数学
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xx2-xy=1()=()2(y-x),括号内应依次填入______、______.-数学
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在下列给小题的括号里填上适当的代数式,使等式成立.(1)3xx+y=()5(x+y);(2)()ab=a2+aba2b;(3)x2-9y2x2-3xy=x+3y().-数学
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填空:a+bab=()a2b______;xx(x-1)=1()______.-数学
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根据分式的基本性质,分式-xx-y可变形为()A.x-x-yB.xx+yC.-xx-yD.-x-x+y-数学
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将分式xyx-y(x≠0,y≠0)中的x、y扩大为原来的3倍,则分式的值为()A.不变B.扩大为原来的3倍C.扩大为原来的9倍D.减小为原来的13-数学
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化简:(a-b)(b-c)(c-a)(b-a)(a-c)2(c-b)3.-数学
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如果把分式a+2ba-2b中的a、b都扩大3倍,那么分式的值一定()A.是原来的3倍B.是原来的5倍C.是原来的13D.不变-数学
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下列式子变形后正确的个数有()(1)-x-y=xy(2)-a-ba+b=1(3)a2-b2a-b=a+b(4)m2-2m+1m2-1=m-1m+1.A.1个B.2个C.3个D.4个-数学
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下列各式从左边到右边的变形正确的是()A.a+ba-b=-ba+bB.0.2a+ba+0.2b=2a+ba+2bC.-x+1x-y=x-1x-yD.x-12y12x+y=2x-yx+2y-数学
题目简介
x+yx2+2xy+y2=()x+y.-数学
题目详情
答案
故填:1.