2X的平方-5X-3怎么因式分解 2x-5x-3因式分解
2x\u7684\u5e73\u65b9-5x-3\u7528\u5341\u5b57\u76f8\u4e58\u6cd5\u56e0\u5f0f\u5206\u89e32x\u7684\u5e73\u65b9-5x-3\u7528\u5341\u5b57\u76f8\u4e58\u6cd5\u56e0\u5f0f\u5206\u89e3
\u89e3\uff1a
2 1
\u00d7
1 -3
\u6240\u4ee5
\u539f\u5f0f=(2x+1)(x-3)
\u9898\u76ee\u5e94\u8be5\u662f2x²-5x-3\u5427
\u5206\u89e3\u4e3a\uff082x+1\uff09\uff08x-3\uff09
2x`2-5x-3
x -3
2x 1
可以得出 (x-3)(2x+1) 在线教你
2x^2-5x-3=2[x^2-(5/2)x-(3/2)]=2[x^2-3x+(1/2)x-3·(1/2)]
=2[x(x-3)+(1/2)(x-3)]=2(x+1/2)(x-3) =(2x+1)(x-3)
2x^2-5x-3
=2x^2-6x+x-3
=2x(x-3)+(x-3)
=(x-3)(2x+1)
(2x+1)(x-3)
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绛旓細2018-10-07 x²+5x-3=0 鍥犲紡鍒嗚В 8 2020-04-14 3x²-x-1=0鐢ㄥ洜寮忓垎瑙ｆ硶? 2016-08-25 2x鐨勫钩鏂鍑5x 3=0鍥犲紡鍒嗚В 3 2014-09-29 鐢ㄩ厤鏂规硶:2x²-5x-3=0 10 2014-10-08 2x²-5x-3=0 1 鏇村绫讳技闂 > 涓轰綘鎺ㄨ崘: 鐗瑰埆...
绛旓細瑙ｏ細鍥犲紡鍒嗚В 锛2x+1锛夛紙x-3锛=0 瑙ｅ緱x=-1/2鎴杧=3 ~濡傛灉浣犺鍙垜鐨勫洖绛旓紝璇峰強鏃剁偣鍑汇愰噰绾充负婊℃剰鍥炵瓟銆戞寜閽畘~鎵嬫満鎻愰棶鐨勬湅鍙嬪湪瀹㈡埛绔彸涓婅璇勪环鐐广愭弧鎰忋戝嵆鍙倊浣犵殑閲囩撼鏄垜鍓嶈繘鐨勫姩鍔泘~O(鈭鈭)O锛屼簰鐩稿府鍔╋紝绁濆叡鍚岃繘姝ワ紒
绛旓細绛旀鍙婅繃绋嬪鍥
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绛旓細2x²-5x=3 2x²-5x-3=0 锛2x+1锛夛紙x-3锛=0 x=-2鍒嗕箣1鎴栬厁=3 璇烽噰绾虫纭瓟妗堬紝浣犱滑鍙彁闂紝涓嶉噰绾虫纭瓟妗堬紝鍥炵瓟閮芥病鏈夊姴锛佽阿璋㈢鐞嗗憳鎺ㄨ崘閲囩撼锛侊紒鏈嬪弸锛岃銆愰噰绾崇瓟妗堛戯紝鎮ㄧ殑閲囩撼鏄垜绛旈鐨勫姩鍔涳紝濡傛灉娌℃湁鏄庣櫧锛岃杩介棶銆傝阿璋
绛旓細棰樼洰涓2x²-5x +3=0 鏃 鏍规嵁鍗佸瓧鐩镐箻娉 鍥犲紡鍒嗚В涓(x-1)(2x-3)=0锛岃В寰梮1=1 x2=3/2銆傞鐩负2x²-5x -3=0 鏃 鏍规嵁鍗佸瓧鐩镐箻娉 鍥犲紡鍒嗚В涓(x-3)(2x+1)=0锛岃В寰梮1=3 x2=-1/2.鍗佸瓧鐩镐箻娉 鎶婁簩娆′笁椤瑰紡鍒嗚В鍥犲紡锛屽浜庡舰濡俛x²+bx+c=0鐨勬暣寮忔潵璇达紝鏂规硶...
绛旓細鍒嗚В鍥犲紡锛1 -3 2 1 鍗筹紙x-3锛夛紙2x+1锛<0 涓ゆ牴涓-1/2,3 鎵浠-1/2<x<3
绛旓細瑙 2x³-5x-3 =(2x³-2x)-(3x+3)=2x(x²-1)-3(x+1)=2x(x-1)(x+1)-3(x+1)=(x+1)(2x²-2x-3)
