3a²+ab-2b²=0
(3a-2b)(a+b)=0
3a-2b=0,a/b=2/3
a+b=0,a/b=-1
∴b/a-a/b-(a²-b²)/ab
=(b²-a²)/ab-(a²-b¹)/ab
=-2a/b
①当a/b=2/3时,原式=-2/3;
②当a/b=-1时,原式=1.
3a²+ab-2b²=0
(3a-2b)(a+b)=0
3a-2b=0,a/b=2/3
a+b=0,a/b=-1
∴b/a-a/b-(a²-b²)/ab
=(b²-a²)/ab-(a²-b¹)/ab
=-2a/b
①当a/b=2/3时,原式=-2/3;
②当a/b=-1时,原式=1.
最新问答: 4x(x+2)=32如何解方程 在线求指导:孟子认为“斧斤以时入 付字怎么组词 Jack's father has a_______ been to the USA many times it is less of a problem to be poor than to be dishonestl汉语意思 只有地中海沿岸有这种气候类型对不对 忘掉过去 珍惜现在 憧憬未来 用英语怎么说 英语翻译Decorated with love and delivered with delight,they fill X+3/8 X=121 变为否定疑问句 I am tall she is beautiful they are fa 如图在⊙O中,直径AB=2,CD切⊙O于A,BC交⊙O于D,若∠C=45度, listening to music这个做主语 求棱长为1的正三棱柱ABC-A1B1C1中异面直线AB1与BC所成角的大小 为什么氮生成HNO3而磷等生成H3PO4? I’ve been feeling so alone,I keep waiting for you but you ne 蕉去掉四点水,可以加什么偏旁 纯铁片与铁片哪个更容易生锈 I‘m going to ___for you at the bus stop 成语接龙 生龙火虎 数学题!六年级!方程做!大姐大哥们!
相关问答: 跪求