2倍的括号X减一反括号的平方等于括号X减三反括号的平方 这个方程怎么算啊 麻烦列一下 Y等于x的平方减去括号2k减一反括号x+3。是什么函数？
\u62ec\u53f7x+1\u53cd\u62ec\u53f7\u7684\u5e73\u65b9\u51cf\u62ec\u53f7x+2\u53cd\u62ec\u53f7\u4e58\u62ec\u53f7x-2\u53cd\u62ec\u53f7\u7b49\u4e8e\u591a\u5c11(x+1)^2-(x+2)(x-2)=(x^2+2x+1)-(x^2-4)
=x^2+2x+1-x^2+4
=2x+5\u3002
\u8fd9\u662f\u4e00\u9053\u6574\u5f0f\u7684\u6df7\u5408\u8ba1\u7b97\u9898\u3002
\u77e5\u8bc6\u70b9\uff1a1\u3002\u4e58\u6cd5\u516c\u5f0f (a+b)^2=a^2+2ab+b^2.
(a+b)(a-b)=a^2-b^2.
2\u3002\u8fd0\u7b97\u987a\u5e8f \u5148\u4e09\u7ea7\uff08\u4e58\u65b9\uff09\uff0c\u540e\u4e8c\u7ea7\uff08\u4e58\uff09\uff0c\u6700\u540e\u662f\u4e00\u7ea7\uff08\u51cf\uff09\u3002
3\u3002\u53bb\u62ec\u53f7\u6cd5\u5219 \u62ec\u53f7\u524d\u9762\u662f\u8d1f\u53f7\uff0c\u53bb\u6389\u62ec\u53f7\u540e\u62ec\u53f7\u91cc\u9762\u5404\u9879\u90fd\u8981\u53d8\u53f7\u3002
\u51fd\u6570Y=x^2-\uff082k-1\uff09x+3\uff0c
\u5b83\u4e00\u5b9a\u662f\u4e8c\u6b21\u51fd\u6570\uff0c
k\u4e0d\u5f71\u54cd\u4e8c\u6b21\u9879\u7cfb\u6570\uff0c
k\u70b9\u5f71\u54cd\u4e00\u6b21\u9879\u7cfb\u6570\u3002
2(x2-2x+1)=x2-6x+9
2x2-4x+2=x2-6x+9
x2+2x-7=0
x2+2x+1=8
(x+1）2=8
式子不好写 然后是x+1=正负二倍根号二
然后x=正负二倍根号二-1
绛旓細鐢眣=1/2锛x-1锛²鈭祒-1=0鏃讹紝鈭村绉拌酱x=1锛寈=-2锛-1,0,1,2.锛3, 4銆傘傘倅=9/2, 2, 1/2, 0锛,1/2, 2锛9/2.銆傘傘
绛旓細瑙ｏ細4锛2x-1锛²=3 锛2x-1锛²=3/4 2x-1=卤鈭3/2 2x=1卤鈭3/2 x=1/2卤鈭3/4
绛旓細2锛2x-1锛²-8锛x-1锛(3+x)=24 2(4x²-4x+2)-8锛3x+x²-3-x锛=24 8x²-8x+4-16x-8x²+24=24 24x=4 x=1/6
绛旓細鏂规硶涓2(x-3)^2=x^2-9 2(x-3)^2=(x-3)(x+3)2(x-3)=x+3 x=9 鏂规硶浜2(x-3)^2=x^2-9 2(x^2-6x+9)=x^2-9 x^2-12x+27=0 (X-9)(X-3)=0 X1=9;X2=3
绛旓細涓ゆ暟鍜岋紙鎴栧樊锛鐨勫钩鏂鍏紡鐨勭粨鏋勭壒寰侊細1銆佸乏杈规槸涓や釜鐩稿悓鐨勪簩椤瑰紡鐩镐箻锛屽彸杈规槸涓夐」寮忥紝鏄乏杈逛簩椤瑰紡涓袱椤圭殑骞虫柟鍜岋紝鍔犱笂鎴鍑忓幓杩欎袱椤逛箻绉殑2鍊銆2銆佸乏杈逛袱椤圭鍙风浉鍚屾椂锛屽彸杈瑰悇椤瑰叏鐢ㄢ滐紜鈥濆彿杩炴帴锛涘乏杈逛袱椤圭鍙风浉鍙嶆椂锛屽彸杈瑰钩鏂归」鐢ㄢ滐紜鈥濆彿杩炴帴鍚庡啀鈥滐紞鈥濅袱椤逛箻绉殑2鍊嶏紙娉細杩欓噷璇撮」鏃舵湭鍖呮嫭...
绛旓細4x²+3x-2=(2x-1)²=4x²-4x+1 7x=3 杩欐槸涓鍏冧竴娆℃柟绋嬪搾锛屼笉鏄竴鍏浜娆℃柟绋
绛旓細43-2(x-1)=3+6(x-1)鍙互鎶妜-1鐪嬩綔涓涓暣浣擄紝鍐嶆寜瑙ｄ竴鍏冧竴娆℃柟绋嬬殑瑙ｆ硶:绉婚」:-2(x-1)-6(x-1)=3-43 鍚堝苟:-8(x-1)=-40 鍖栦负绯绘暟1:x-1=5 绉婚」:x=6
绛旓細浜屾嫭鍙穢+1鍑忎簩鍙嶆嫭鍙=6鐢ㄧ瓑寮忕殑鎬ц川瑙ｆ柟绋 2(X+1-2)=6锛 2(X-1)=6锛 X-1=6梅2锛 X-1=3锛 X=3+1锛 X=4銆15-x鎷彿8=48瑙ｆ柟绋嬪苟楠岀畻鐢ㄧ瓑寮忕殑鎬ц川 锛15-x锛8=48 15-x=48/8 x=15-6 x=9 4(x+1)=-20鐢ㄧ瓑寮忕殑鎬ц川瑙ｆ柟绋 绛夊紡鐨勬ц川灏辨槸锛岀瓑鍙蜂袱杈瑰悓鏃...
绛旓細涓鎷彿x鍑忎竴鎷彿鐨勫钩鏂绛変簬27 3锛坸-1锛²=27 瑙ｏ細(x-1)²=9 x-1=卤3 x1=4锛x2=-2
绛旓細姣斿锛2a-锛5b-3+a锛夛紝鎷彿鍓嶆槸璐熷彿锛堝噺鍙凤級鍘绘帀鎷彿灏辫鏀瑰彉绗﹀彿锛2a-5b+3-a銆2銆佽繖鏄湁鍏紡鐨勶紝锛坅+b)(a-b)=a2-b2 锛坸+7y锛夛紙x-5y锛夊儚杩欎竴棰樻妸x鐪嬪仛a锛屾妸7y鐪嬫垚涓涓暣浣撲负b锛屽幓鎺夋嫭鍙峰氨鏄x2-锛7y锛2 3,銆佸畬鍏骞虫柟鍏紡 鏈変袱涓叕寮忥細锛坅+b)2=a2+2ab+b2 (a-b)2=a2-...
