因式分解〖2x〗^2-11x+5
2x^2-11x+5=0 \u89e3\u65b9\u7a0b \u56e0\u5f0f\u5206\u89e3\u6cd5\u505a\u60a8\u597d\uff1a
2x^2-11x+5=0
(2x-1)(x-5)=0
x1=1/2 x2=5
\u5982\u679c\u672c\u9898\u6709\u4ec0\u4e48\u4e0d\u660e\u767d\u53ef\u4ee5\u8ffd\u95ee\uff0c\u5982\u679c\u6ee1\u610f\u8bf7\u70b9\u51fb\u201c\u91c7\u7eb3\u4e3a\u6ee1\u610f\u56de\u7b54\u201d
\u5982\u679c\u6709\u5176\u4ed6\u95ee\u9898\u8bf7\u91c7\u7eb3\u672c\u9898\u540e\u53e6\u53d1\u70b9\u51fb\u5411\u6211\u6c42\u52a9\uff0c\u7b54\u9898\u4e0d\u6613\uff0c\u8bf7\u8c05\u89e3\uff0c\u8c22\u8c22\u3002
\u795d\u5b66\u4e60\u8fdb\u6b65\uff01
\u4f60\u597d\uff01
=(2x^2-3-11x+3)(2x^2-3+11x-3)
=(2x^2-11x)(2x^2+11x-6)
=x(2x-11)(2x-1)(x+6)
2x^2-11x+5=(2x-1)(x-5)
写错了
是2x²-11x+5
=2x²-10x-x+5
=2x(x-5)-(x-5)
=(x-5)(2x-1)
原式=(2X-1)(X-5)
〖2x〗^2-11x+5
=(2x-1)(x-5)
绛旓細璁(x-3)(2x锛峱)鈮2x²-11x+m 绛夊紡宸﹁竟灞曞紑鍚庯紝鏈 2x²锛嶏紙6锛媝锛墄锛3p)鈮2x²-11x+m 鎵浠 6锛媝锛11 鍜 3p锛漨 瑙ｅ緱 p锛5 m=15
绛旓細绛夊紡鈶3x²锛12x锛15锛0涓紝鐢ㄥ崄瀛楃浉涔樻硶鍒欎簩娆℃柟绯绘暟3鍙3涔1锛3鍦ㄤ笂锛1鍦ㄤ笅锛屾暟瀛-15鍙-3涔5锛-3鍦ㄤ笂锛5鍦ㄤ笅锛屽垯鍗佸瓧鐩镐箻鏈3涔5寰15锛1涔-3寰-3锛15-3=12锛屾濂芥槸涓娆℃柟绯绘暟12锛屽垯鍘熺瓑寮鍥犲紡鍒嗚В涓(3x-3) (x+5)=0;绛夊紡鈶2x²锛11x锛5锛0 涓紝鐢ㄥ崄瀛楃浉涔樻硶鍒浜...
绛旓細杩欎釜涓嶈兘鐢ㄥ崄瀛楃浉涔樼洿鎺ュ仛鐨勩
绛旓細(1)2x^2+11x+15 =(x锛3)(2x锛5)(2)12x^2-7x+1 =(3x锛1)(4x锛1)(3) 12x^2-4x-1 =(2x锛1)(6x锛1)
绛旓細鍗佸瓧浜ゅ弶鐩镐箻娉 1 -3 X 1 -8 x^2-11x+24=锛坸-3)(x-8)
绛旓細(1) 3脳2蠂锛50 = 70 锛 (鍥)銆(1) 3脳3蠂锛2脳(10锛嵪) = 48 ,(2) 4脳6蠂锛30 = 150 锛 (2) (2蠂锛15)锛5 = 31 ,(3) 2脳(蠂锛8) = 28 , (3) 4脳(25锛2蠂)锛2脳3蠂 = 16 ,(4) 5脳(28锛2蠂) = 80 , (4) 500锛(100锛5...
绛旓細鍥犲紡鍒嗚В X^2-X-6=0 2X^2-3X-2=0 -3X^2+6X=2 4X^2-4X+1=0 X^2-2X+3=0 -X^2-2X+8=0 X^2-X-2=4 2X^2-3X+1=0 -3X^2+4X+4=0 4X^2-11X-3=3 x^2-2x-3=0 4x^2-1=0 5x^2-3x+2=0 -x^2-2x+8=0 x^2-8x+12=0 2x^2-6x+3=0 2x^2-11x+5=0 4...
绛旓細杩欐槸閰嶆柟娉曪紝涓鑸鐪嬩綘鎰熻锛屼綘涔熷彲浠ュ儚鎴戣繖鏍凤紝鍏堢‘瀹氱涓椤
绛旓細=2(x^2-4x+4)-3x+6 =2x^2-8x+8-3x+6 =2x^2-11x+14 =(x-2)(2x-7)
绛旓細x^3-4x^2-11x+30 =x^3-2x^2-2x^2-11x+30 =x^2(x-2)-(2x+15)(x-2)=(x^2-2x-15)(x-2)=(x+3)(x-5)(x-2),1,=(x-1)(x^2(x 4)-11x-30) =(x-1)(x^3 4x^2-11x-30) (x-1)(x 2)(x-3)(x 5),0,
