如果a²－ab－4x是一个完全平方式，那么x等于_百度知道
如果a²－ab－4x是一个完全平方式，那么x等于
/2)²/4
x = - b² - ab + b&#178，
a²所以; - ab - 4x
是一个完全平方式;&#47，
4x = - b&#178。因为;4= (a - b&#47a&#178
其他类似问题
为您推荐：
完全平方式的相关知识
其他4条回答
b&#178-4x=¼x=-b²&#47
-b²/16
a²－ab－4x是一个完全平方式=(a-b/2)^2=a^2-ab+b^2/4所以 -4x=b^2/4x=-b^2/16
参考资料：
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁【急】初中数学八下 分解因式求助！！！！！_百度知道
【急】初中数学八下 分解因式求助！！！！！
-4ab+b²+6a-3b（8）x²-y²-c²-6x+9-y&#178、分组分解法（1）m²+5m-mn-5n
（2）2ax-10ay+5by-bx
（3）xy-x-y+1
（4）a（b-c）+a²-y²+4ab（4）a⁴+¼（5）4x²-bc
（5）x²+a&#178、综合（1）2a²+ax+ay
（6）4a²（2）x²-5ab-3b²
（7）4a&#178一;-b²
(3) （a-b）²-7xy+3y²+2y-1二
各位谢谢啊
能做的尽量帮帮我吧
提问者采纳
，其余自己想想再做.m²+5m-mn-5n=m²+(5-n)*m-5n=(m+5)*(m-n)就给你解这一道题吧
提问者评价
太感谢了，真心有用
其他类似问题
为您推荐：
其他1条回答
一(1)=m(m+5)-n(m+5)=(m+n)(m+5)(2)=2a(x-5y)-b(x-5y)=(2a-b)(x-5y)(3)=x(y-1)-(y-1)=(x-1)(y-1)(4)=ab-ac+a^2-bc=a(a+b)-c(a+b)=(a-c)(a+b)(5)=(x+y)(x-y)+a(x+y)=(x-y-a)(x+y)(6)=(2a-b)^2-c^2=(2a-b-c)(2a-b+c)(7)=(2a-b)(2a+b)+3(2a-b)=(2a-b)(2a+b+3)(8)=x^2-(y-1)^2=(x+y-1)(x-y+1)二(1)=2a^2-6ab+ab-3b^2=2a(a-3b)+b(a-3b)=(2a+b)(a-3b)(2)=(x+3)^2-y^2=(x+3+y)(x+3-y)(3)=a^2-2ab+b^2+4ab=a^2+2ab+b^2=(a+b)^2(4)=(a^2+1/2)^2,完全平方式(5)=4x^2-4y^2+7y^2-7xy=4(x+y)(x-y)-7y(x-y)=(4x-3y)(x-y)(6)这题没看懂，不知是不是出错了
分解因式的相关知识
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁两人同时从A,B两地相向而行,8分钟相遇,相遇后两人均减速跑步,每分钟比原来少跑12米,各自到达B,A两地后返回,又经过18分钟,两人再次相遇,问A,B两地相距多少米?_作业帮
两人同时从A,B两地相向而行,8分钟相遇,相遇后两人均减速跑步,每分钟比原来少跑12米,各自到达B,A两地后返回,又经过18分钟,两人再次相遇,问A,B两地相距多少米?
两人同时从A,B两地相向而行,8分钟相遇,相遇后两人均减速跑步,每分钟比原来少跑12米,各自到达B,A两地后返回,又经过18分钟,两人再次相遇,问A,B两地相距多少米?
Ultimate luxuryEnamel art of top watch The colour from the enamel on wholesale platinum mixture burned inside the art of knickknack producing could be traced to ancient Egyptian times,but for the Byzantine era,enamel art and gemstones,gold combined for the cover of the Gospels,the creation of plaque as well as the altarpiece.In the identical time,the medieval European nobility to their special way of producing jewelry with enamel.Roman period and also the Gothic period,the Church of St.cards and clothing may also be frequently employed in luxury enamel decoration,but in addition in elements of the Rhine River and Moss workshops in schools (school),when glorious moment of enamel method gradually gave strategy to France wholesaler region schools,the schools out of the enamel for the metal binding up the method along with the much more liberal utilization of enamel (for example micro-painting method along with the gray scale strategy),and a far more sophisticated and complicated identified,and for now the enamel process has far-reaching effects.Renaissance,the flourishing from the arts.Enamel of these products in Europe presents a captivating ancient and rich diversity of skills,to jewelry on the future progression of the enamel as well as watch an exhibition of your direct method.Naturally,watch the 21st century enamel method,with good technologies and practitioners continue to study,but the development and innovation.Enamel in certain contemporary works of masters,we only begin to see the old enamel technology,but in addition saw several new abilities.2011,the usage of enamel about the function inside the watch or even use the techniques difficult wholesale nike air shoxjour.2011,enamel on the clock tactics employed in mixture with a variety of techniques show the trend.机智的小伙伴们，求教这道题的详细做法，多谢啦_百度知道
机智的小伙伴们，求教这道题的详细做法，多谢啦
com/zhidao/pic/item/10dfa9ec8ad2b5fac770&nbsp.jpg" esrc="/zhidao/wh%3D600%2C800/sign=408a4d7594dda144da5c64b4dfa9ec8ad2b5fac770.baidu.jpg" target="_blank" title="点击查看大图" class="ikqb_img_alink"><img class="ikqb_img" src="/zhidao/wh%3D450%2C600/sign=15df6ee1d3a20cf446c5f6dbdfa9ec8ad2b5fac770.baidu://e.hiphotos.baidu://e://e;<a href="http
π(&#189;πa&#178;πa&#178;-2(πa&#178(1)=&#188;16-2a&#178;/3)&#178;π-1)b&#178;(6)=&#188;(5)=&#189;πa&#178;/-πa&#178;a)&#178;/16)=&#188;(a+2a/8+&#188;a)&#178;-2×[&#188;/a&#178;πa&#178;π(&#189;2)&#178;/πa&#178;πb&#178;9(3)=看不清(4)=(&#188;]=&#188;)×2=(&#189;8(8)=&#188;=5a&#178;π(2a/3-&#188;-&#189;(7)=π(a//-&#189;/a)&#178;-(π+2)a&#178;9=(5-π)a&#178;/b&#178;a)&#178;8(2)=&#189;/=(π+2)a&#178;3)×2a/×(&#189;π(&#189;-&#189;=πa&#178;9-πa&#178
gemini6666
来自：作业帮
其他类似问题
为您推荐：
小伙伴的相关知识
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁已知a&#178;-b&#178;=&#188;,a-b=&#189;,求a+b 和 ab 和a&#178;+b&#178;1、2、3、这样答哦_作业帮
已知a&#178;-b&#178;=&#188;,a-b=&#189;,求a+b 和 ab 和a&#178;+b&#178;1、2、3、这样答哦
已知a&#178;-b&#178;=&#188;,a-b=&#189;,求a+b 和 ab 和a&#178;+b&#178;1、2、3、这样答哦
a&#178;-b&#178;=(a+b)(a-b)=&#188;,a-b=&#189;,所以a+b=1/2,而(a-b)(a-b)=a&#178;+b&#178;-2ab=1/4,(a+b)(a+b)=a&#178;+b&#178;+2ab=1/4,所以ab=0,代入上式得a&#178;+b&#178;=1/4
1、a b=1/2 2、a*b=0 3、a^2 b^2=1/4
1.a+b=1/2,，2，ab=0，3，a&#178;+b&#178;=1/4
能详细点吗
额，a&#178;-b&#178;=(a-b)*(a+b)=1/4，带入a-b=&#189;，所以.a+b=1/2，并列
a-b=&#189;，.a+b=1/2，得a=1/2,b=0,所以ab=0，3，a&#178;+b&#178;=1/4}