某天数学课上，学习了整式的除法运算，放学后，小明回到家拿出课堂笔记，认真地复习课上学习的内容，他突
\u67d0\u5929\u6570\u5b66\u8bfe\u4e0a\u3002\u5b66\u4e60\u4e86\u6574\u5f0f\u7684\u9664\u6cd5\u8fd0\u7b97\uff0c\u653e\u5b66\u540e\uff0c\u5c0f\u660e\u56de\u5bb6\u62ff\u51fa\u8bfe\u5802\u7b14\u8bb0\u8ba4\u771f\u7684\u590d\u4e60\u8bfe\u4e0a\u5b66\u4e60\uff0c\u4ed6\u7a81\u7136\u53d1\u73b0\u6709\u4e00\u89e3\uff1a\u7b2c\u4e00\u4e2a\u7a7a\u4e3a 21X^4Y^3\u00f7\uff08-7X^2Y\uff09= -3x²y²
\u7b2c\u4e8c\u4e2a\u7a7a\u4e3a 5XY\u00d7\uff08-7X^2Y\uff09= -35x³y²
\u6211\u662f\u8001\u5e08 \u8c22\u8c22\u91c7\u7eb3
\uff0821X^4Y^3 - 35X^3Y^2 +7X^2Y^2\uff09\u00f7\uff08-7X^2Y\uff09= - 3X^2Y^2+5XY-Y
| 商的第一项=21x 4 y 3 ÷（-7x 2 y）=-3x 2 y 2 ； 被除式的第二项=-（-7x 2 y）×5xy=35x 3 y 2 ． |
绛旓細鍟嗙殑绗竴椤=2ix涓儁3梅锛-3x2y锛=-3x2y2锛涜闄ゅ紡鐨勭浜岄」=-锛-3x2y锛壝5xy=35x3y2锛
绛旓細棣栧厛鏍规嵁鏈鍚庣粨鏋滄槸涓夐」鍒ゆ柇鍑哄乏杈圭涓鎷彿鍐呬笁椤逛笉浼氬嚭鐜板悎骞跺悓绫婚」锛佺劧鍚庝篃鍙互鐭ラ亾宸﹁竟绗竴鎷彿鍐呬笁椤瑰垎鍒拰绗簩涓嫭鍙疯繘琛岃繍绠楀悗寰楀埌鍙充晶涓変釜椤圭殑缁撴灉锛佺劧鍚庢牴鎹浘鐗囦腑鐨勮繛绾跨煡閬撯憽姝ラ缁撴灉宸茬粡瀹屾暣浜嗭紝涓嶉渶瑕佸啀杩涜璁＄畻銆備絾鈶犲拰鈶㈠垯鍒嗗埆闇瑕佹绠楀拰鍙嶆帹 棣栧厛鏄憼锛屽緱鍑虹浜屼釜绌虹己涓21x^4y^3梅锛-7x^...
绛旓細澹伴煶鐨勪紶鎾熷害涓350m/s杞寲鎴愮瀛﹁鏁版硶灏辨槸3.5脳10鐨勪簩娆℃柟锛屽簲鐢ㄨ繖娆璇句笂璁茬殑鏁村紡鐨勯櫎娉鏉ヨ绠楋紝3梅3.5鈮0.857锛10鐨8娆℃柟梅10鐨勪簩娆℃柟=10鐨6娆℃柟锛堝悓搴曟暟骞傜殑闄ゆ硶鍏紡涓烘寚鏁扮浉鍑忓氨鏄8-2=6锛夛紝绛旀涓0.857脳10鐨6娆℃柟锛屾帴鐫鍥犱负绉戝璁版暟娉曞繀椤绘暟瀛楀湪1鍒10涔嬮棿 鑰0.857鏄剧劧涓嶅湪闇瑕...
绛旓細c)涓嶈灏嗗悓搴曟暟骞傜殑涔樻硶涓鏁村紡鐨鍔犳硶鐩告贩娣嗭紝瀵逛箻娉曪紝鍙搴曟暟鐩稿悓鎸囨暟灏卞彲浠ョ浉鍔;鑰屽浜庡姞娉曪紝涓嶄粎搴曟暟鐩稿悓锛岃繕瑕佹眰鎸囨暟鐩稿悓鎵嶈兘鐩稿姞;浜屻佸箓鐨勪箻鏂逛笌绉殑涔樻柟 涓夈佸悓搴曟暟骞鐨勯櫎娉 (1)杩愮敤娉曞垯鐨勫墠鎻愭槸搴曟暟鐩稿悓锛屽彧鏈夊簳鏁扮浉鍚岋紝鎵嶈兘鐢ㄦ娉曞垯 (2)搴曟暟鍙互鏄叿浣撶殑鏁帮紝涔熷彲浠ユ槸鍗曢」寮忔垨澶氶」寮 (3)鎸囨暟...
绛旓細5x=360 x=72 3.0.125鐨2007娆℃柟*8鐨2008娆℃柟 =0.125鐨2007娆℃柟*8鐨2007娆℃柟*8鐨1娆℃柟 =(0.125*8)鐨2007娆℃柟*8 =1鐨2007娆℃柟*8 =8 4.(a-b)鐨勫钩鏂=a鐨勫钩鏂+2ab+b鐨勫钩鏂瑰彲鍙樹负 a鐨勫钩鏂+b鐨勫钩鏂= (a+b)鐨勫钩鏂+2ab 5.(m-3n锛夊钩鏂-锛2m+3n)(-2m+3n)+6n(m+n)=(m-3n锛...
绛旓細2m(m-n)^3+6(n-m)^2 =2锛坢-n)^2*(m^2-mn+3)鍙兘鍖栨垚杩欐牱浜 2a(a+b-c)-3b(a+b-c)+5c(c-a-b)=锛2a-3b-5c)(a+b-c)鍒嗗埆鏄35x^3y^2鍜-3x^2y^2
绛旓細鍟嗙殑绗竴椤=21x 4 y 3 梅锛-7x 2 y锛=-3x 2 y 2 锛涜闄ゅ紡鐨勭浜岄」=-锛-7x 2 y锛壝5xy=35x 3 y 2 锛
绛旓細-7x^2y(N+5xy-y)=锛21x^4y^3-M+7x^2y^2)锛屽睍寮-7x^2yM-35x^3y^2+7x^2y^2=21x^4y^3-N+7x^2y^2锛-7x^2yM=21x^4y^3锛-N=-35x^3y^2锛汳=21x^4y^3/(-7x^2y)=-3x^2y^2銆侼=35x^3y^2銆傝闄ゅ紡涓槸-3x^2y^2锛涘晢涓槸35x^3y^2銆
