馃幆銆愬紑绡囨彁闂€戜负浠€涔堜綘鎬昏澶氶」寮忛毦浣忥紵

鏄笉鏄瘡娆＄湅鍒板儚 鈥?strong>鈥媥鲁-2x虏-x鈥?/strong>鈥?杩欐牱鐨勫紡瀛愬氨澶寸毊鍙戦夯锛熷埆鎱岋紒浠婂ぉ鍜变滑鐢?涓秴瀹炵敤鏂规硶锛屾妸澶氶」寮忓垎瑙ｅ彉鎴愨€滄嫾涔愰珮鈥濃€斺€旀湁鎵嬪氨浼氾紒

馃攳 鏂规硶涓€锛氭彁鍏洜寮忔硶锛堝厛钖呯緤姣涳紒锛?/h3>

鈥?strong>鈥嬫牳蹇冨彛璇€鈥?/strong>鈥嬶細鐪嬭鍏叡鍥犲瓙锛岀洿鎺モ€滆枀鈥濆嚭鏉ワ紒
涓句釜鏍楀瓙馃尠锛氬垎瑙?鈥?strong>鈥媥鲁-2x虏-x鈥?/strong>鈥?/p>

1. 鈥?strong>鈥嬫壘鍏洜寮忊€?/strong>鈥嬶細涓夐」閮藉惈x 鈫?鍏洜寮忔槸x
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鈥?strong>鈥嬩綘鍙兘鎯抽棶鈥?/strong>鈥嬶細涓轰粈涔堥潪瑕佸厛鎻愬叕鍥犲紡锛?br/> 馃挕 鈥?strong>鈥嬪皬绉樺瘑鈥?/strong>鈥嬶細鍏洜寮忓氨鍍忓揩閫掔鐨勮兌甯︼紝鎾曞紑瀹冩墠鑳界湅鍒伴噷闈㈢殑涓滆タ锛佸鏋滆烦杩囪繖涓€姝ワ紝鍚庨潰鐢ㄥ叕寮忔硶鍙兘鐧藉繖娲诲崐澶┿€?/p>

鈥?strong>鈥嬮伩鍧戞寚鍗椻€?/strong>鈥嬶細

• 鎻愬畬鍏洜寮忓悗锛屾嫭鍙烽噷鍒紡鍐?锛佹瘮濡?鈥?strong>鈥?x虏-4x=2x(x-2)鈥?/strong>鈥嬶紝鑰屼笉鏄?x(x-2+0)
• 璐熷彿涔熻涓€璧锋彁锛佹瘮濡?鈥?strong>鈥?x虏+3x=-x(x-3)鈥?/strong>鈥?/li>

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馃摎 鏂规硶浜岋細鍏紡娉曪紙鑳岀啛杩?鏉★紝绉掓潃50%棰橈紒锛?/h3>

鈥?strong>鈥嬪繀鑳屽叕寮忔竻鍗曗€?/strong>鈥嬶細

1. 鈥?strong>鈥嬪钩鏂瑰樊鈥?/strong>鈥嬶細a虏-b虏=(a+b)(a-b)
2. 鈥?strong>鈥嬪畬鍏ㄥ钩鏂光€?/strong>鈥嬶細a虏卤2ab+b虏=(a卤b)虏
3. 鈥?strong>鈥嬬珛鏂瑰拰/宸€?/strong>鈥嬶細a鲁卤b鲁=(a卤b)(a虏鈭揳b+b虏)

鈥?strong>鈥嬪疄鎴樻紨绀衡€?/strong>鈥嬶細鍒嗚В 鈥?strong>鈥媥虏+6x+9鈥?/strong>鈥?/p>

1. 鈥?strong>鈥嬭瀵熺粨鏋勨€?/strong>鈥嬶細x虏+2脳3x+3虏 鈫?绗﹀悎瀹屽叏骞虫柟鍏紡
2. 鈥?strong>鈥嬪鍏紡鈥?/strong>鈥嬶細(x+3)虏 鈫?鏀跺伐锛?/li>

馃挜 鈥?strong>鈥嬮殣钘忔妧宸р€?/strong>鈥嬶細閬囧埌鍍?鈥?strong>鈥媥鈦?16鈥?/strong>鈥?杩欑楂樻椤癸紝杩炵画鐢ㄥ钩鏂瑰樊鍏紡锛?br/> x鈦?16 = (x虏+4)(x虏-4) = (x虏+4)(x+2)(x-2)

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馃攧 鏂规硶涓夛細鍒嗙粍鍒嗚В娉曪紙4椤瑰紡鏉€鎵嬮攺锛侊級

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1. 鈥?strong>鈥嬪垎缁勨€?/strong>鈥嬶細鍓嶄袱椤逛竴缁勶紝鍚庝袱椤逛竴缁?鈫?(am+bm)+(an+bn)
2. 鈥?strong>鈥嬪悇缁勬彁鍏洜寮忊€?/strong>鈥嬶細m(a+b)+n(a+b)
3. 鈥?strong>鈥嬪啀鎻愭暣浣撳叕鍥犲紡鈥?/strong>鈥嬶細(a+b)(m+n)

鈥?strong>鈥嬩妇涓弽渚嬧€?/strong>鈥嬶細涓轰粈涔?鈥?strong>鈥媥鲁+x虏+x+1鈥?/strong>鈥?涓嶈兘鐩存帴鍒嗙粍锛?br/> 璇曡瘯鐪?鈫?x虏(x+1)+1(x+1) 鈫?(x+1)(x虏+1)锛佸師鏉ヤ篃鑳借锛?br/> 锛堣繖灏辨槸鏁板鐨勯瓍鍔涒€斺€旀湁鏃跺€欓敊鐫€閿欑潃灏卞浜嗮煒傦級

鉁濓笍 鏂规硶鍥涳細鍗佸瓧鐩镐箻娉曪紙浜屾涓夐」寮忕粓缁撹€咃級

鈥?strong>鈥嬩竴鍙ヨ瘽鍘熺悊鈥?/strong>鈥嬶細鎷嗕袱澶达紝鍑戜腑闂达紒
浠?鈥?strong>鈥媥虏+5x+6鈥?/strong>鈥?涓轰緥锛?/p>

1. 鈥?strong>鈥嬫媶椤光€?/strong>鈥嬶細鎶?鎷嗘垚2脳3
2. 鈥?strong>鈥嬮獙璇佷氦鍙夌浉涔樷€?/strong>鈥嬶細2x+3x=5x 鈫?绗﹀悎鏉′欢
3. 鈥?strong>鈥嬪啓缁撴灉鈥?/strong>鈥嬶細(x+2)(x+3)

鈥?strong>鈥嬮珮闃剁帺娉曗€?/strong>鈥嬶細鍙屽崄瀛楃浉涔橈紙瀵逛粯6椤瑰紡锛侊級
姣斿鍒嗚В 鈥?strong>鈥?x虏-4xy-3y虏-4x+10y-3鈥?/strong>鈥嬶細

1. 鍏堝垎瑙ｅ墠3椤癸細鍗佸瓧鐩镐箻寰?2x-3y)(2x+y)
2. 鍐嶈皟鏁村父鏁伴」锛岃涓ゆ浜ゅ弶鐩镐箻鐨勫拰鍖归厤鍓╀綑椤?/li>

馃敡 鏂规硶浜旓細鎷嗛」琛ラ」娉曪紙涓囪兘鎬ユ晳鍖咃級

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1. 鈥?strong>鈥嬪己琛屾媶椤光€?/strong>鈥嬶細x鈦?x虏+1 = x鈦?2x虏+1 -x虏
2. 鈥?strong>鈥嬪彉鎴愬钩鏂瑰樊鈥?/strong>鈥嬶細(x虏+1)虏 -x虏 = (x虏+x+1)(x虏-x+1)

鈥?strong>鈥嬬嫭瀹跺績寰椻€?/strong>鈥嬶細杩欎釜鏂规硶鍍忊€滄惌妗モ€濃€斺€斿湪鍘熸湰娌℃湁璺殑鍦版柟閫犱竴搴фˉ銆傝櫧鐒舵楠ゅ锛屼絾鑳借В鍐?0%鐨勫鏉傞锛?/p>

馃挕銆愪釜浜鸿瑙ｃ€戜负浠€涔堝闇搁兘鐖辩帺鍥犲紡鍒嗚В锛?/h3>

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馃殌 鏈€鍚庡彯鍢憋細閬垮潙鎸囧崡+缁冧範寤鸿

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2. 鈥?strong>鈥嬫贩鍚堥鐢ㄧ粍鍚堟嫵鈥?/strong>鈥嬶細鍏堟彁鍏洜寮忊啋鍐嶇湅鑳藉惁濂楀叕寮忊啋鏈€鍚庡垎缁勬垨鎷嗛」
3. 鈥?strong>鈥嬫瘡澶╃粌3棰樷€?/strong>鈥嬶細鍧氭寔1涓湀锛岄€熷害鎻愬崌200%锛侊紙瀹炴祴鏈夋晥锛屼笉淇′綘璇曡瘯锛燂級

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