四倍的。二x减一的平方。等于。九倍的。二x加一。的平方。么做。 四加十二倍的x减y的差加九倍的x减y括号的平方分解因式 急急...
x\u5e73\u65b9\u51cf\u56db\u500d\u7684\u6839\u53f7\u4e8cx\u52a0\u4e5d\u7b49\u4e8e\u96f6\u7528\u5224\u522b\u5f0fX^2-4\u221a2X+9=0
a=1\uff0cb=-4\u221a2\uff0cc=9
\u0394=b^2-4ac
=32-4\u00d79
=-4<0
\u2234\u539f\u65b9\u7a0b\u6ca1\u6709\u5b9e\u6570\u6839\u3002
\u89e3\u65b9\u7a0b\u4f9d\u636e
1\u3001\u79fb\u9879\u53d8\u53f7\uff1a\u628a\u65b9\u7a0b\u4e2d\u7684\u67d0\u4e9b\u9879\u5e26\u7740\u524d\u9762\u7684\u7b26\u53f7\u4ece\u65b9\u7a0b\u7684\u4e00\u8fb9\u79fb\u5230\u53e6\u4e00\u8fb9\uff0c\u5e76\u4e14\u52a0\u53d8\u51cf\uff0c\u51cf\u53d8\u52a0\uff0c\u4e58\u53d8\u9664\u4ee5\uff0c\u9664\u4ee5\u53d8\u4e58\u3002
2\u3001\u7b49\u5f0f\u7684\u57fa\u672c\u6027\u8d28
\u6027\u8d281\uff1a\u7b49\u5f0f\u4e24\u8fb9\u540c\u65f6\u52a0(\u6216\u51cf)\u540c\u4e00\u4e2a\u6570\u6216\u540c\u4e00\u4e2a\u4ee3\u6570\u5f0f\uff0c\u6240\u5f97\u7684\u7ed3\u679c\u4ecd\u662f\u7b49\u5f0f\u3002\u7528\u5b57\u6bcd\u8868\u793a\u4e3a\uff1a\u82e5a=b\uff0cc\u4e3a\u4e00\u4e2a\u6570\u6216\u4e00\u4e2a\u4ee3\u6570\u5f0f\u3002
(1)a+c=b+c
(2)a-c=b-c
\u6027\u8d282\uff1a\u7b49\u5f0f\u7684\u4e24\u8fb9\u540c\u65f6\u4e58\u6216\u9664\u4ee5\u540c\u4e00\u4e2a\u4e0d\u4e3a0\u7684\u6570\uff0c\u6240\u5f97\u7684\u7ed3\u679c\u4ecd\u662f\u7b49\u5f0f\u3002
\u7528\u5b57\u6bcd\u8868\u793a\u4e3a\uff1a\u82e5a=b\uff0cc\u4e3a\u4e00\u4e2a\u6570\u6216\u4e00\u4e2a\u4ee3\u6570\u5f0f\uff08\u4e0d\u4e3a0\uff09\u3002\u5219\uff1a
a\u00d7c=b\u00d7c \u6216a/c=b/c
\u6027\u8d283\uff1a\u82e5a=b\uff0c\u5219b=a\uff08\u7b49\u5f0f\u7684\u5bf9\u79f0\u6027\uff09\u3002
\u6027\u8d284\uff1a\u82e5a=b\uff0cb=c\u5219a=c\uff08\u7b49\u5f0f\u7684\u4f20\u9012\u6027\uff09\u3002
4+12(x-y)+9(x-y)²
=[3(x-y)]²+12(x-y)+2²
=[3(x-y)+2]²
=(3x-3y+2)²
解：
4(2x-1)²=9(2x+1)²
4(2x-1)²-9(2x+1)²=0
(4x-2)²-(6x+3)²=0
(4x-2+6x+3)(4x-2-6x-3)=0
(10x+1)(-2x-5)=0
x1=-1/10,x2=-5/2
绛旓細鍥涘嶇殑銆備簩x鍑忎竴鐨勫钩鏂广绛変簬銆備節鍊嶇殑銆備簩x鍔犱竴銆傜殑骞虫柟銆備箞鍋 瑙ｏ細4(2x-1)²=9(2x+1)²4(2x-1)²-9(2x+1)²=0 (4x-2)²-(6x+3)²=0 (4x-2+6x+3)(4x-2-6x-3)=0 (10x+1)(-2x-5)=0 x1=-1/10,x2=-5/2 ...
绛旓細鍥炵瓟锛氳瘹淇￠噰绾崇鍥炶繃绋,闃叉鍥炵瓟鏈変汉涓嶉噰绾
绛旓細x-1=-2鍒嗕箣5 x-1=-2.5 x=-2.5+1 x=-1.5 鍗4锛坸-1锛鐨勫钩鏂=25鐨勮В鏄痻=3.5鎴杧=-1.5
绛旓細4銆x鍑忓幓0.3鐨勫樊鐨4.5鍊 4.5(x-0.3)5銆乤鐨勪竴鍗婁笌b鐨勫拰鐨6鍊(+b)鍥涖佽В鍐抽棶棰樸1銆佺數褰遍櫌閲屽骇浣嶇殑鎬绘帓鏁版槸m鎺,鑻ョ涓鎺掔殑搴т綅鏁版槸a,骞朵笖鍚庝竴鎺掓绘瘮鍓嶄竴鎺掔殑搴т綅鏁板1涓,鍒欑數褰遍櫌閲岀m鎺掓湁澶氬皯涓骇浣?鐢遍鎰忓緱,绗竴鎺掓湁a涓骇浣,绗簩鎺掓湁(a+1)涓骇浣,鈥,渚濇绫绘帹,绗琺鎺掓湁(a+m-1...
绛旓細(X-1)^2-4(2-3X^2)=0锛孹^2-2X+1-8+12X^2=0锛13X^2-2X-7=0锛屛=4+4脳13脳7=368锛孹=(2卤4鈭23)/26锛孹1=(1+2鈭23)/13锛X2=(1-2鈭23)/13銆
绛旓細2x^4-x^2=28 2x^4-x^2-28=0 (x^2-4)(2x^2+7)=0 鍥犱负2x^2+7>0 鎵浠^2-4=0 (x-2)(x+2)=0 x=2鎴杧=-2
绛旓細甯屾湜鑳藉府鍒颁綘, 鏈涢噰绾. 绁濆涔犺繘姝
绛旓細鍥涘嶇殑x鍔犱笂涓鐨瀹屽叏骞虫柟鍑鍘浜寈鍑忓幓浜斾箻浠ヤ簩x鍔犱笂浜绛変簬浜屽崄涓 4锛坸+1锛²-2x-5*2x+5=21 缈昏瘧鐨勫鍚楋紵4锛坸²+2x+1)-2x-10x+5=21 4x²+8x+4-2x-10x+5=21 4x²+8x-2x-10x+4+5-21=0 4x²-4x-12=0 x²-x-3=0 x²-x+1/4=3...
绛旓細涓嬪垪瀹炴暟涓槸鏂圭▼鎷彿x鍑忎竴鐨勫钩鏂圭瓑浜庡洓x鐨勮В鏄:锛, 鈶犱笁鍔犱簩鍊嶆牴鍙蜂簩鈶′笁鍑忎簩鍊鏍瑰彿浜岋紝鈶㈣礋涓夛紝鈶ｈ礋2鍊鏍瑰彿2 鈭达箼x锛1锕²锛4x 鈫抶²锛6x锛1=0 ,x鈮0 鈭磝=3卤2鈭2 鈭存柟绋:鎷彿x鍑忎竴鐨勫钩鏂圭瓑浜庡洓x鐨勮В鏄:锛氣憼鍜屸憽 ...
绛旓細4锛坸+2)²=16 (x+2)²=4 x+2=-2,x+2=2 x=-4,x=0
