2x平方+1=3x怎么解答
2x\u7684\u5e73\u65b9+3x=1\u600e\u4e48\u89e3\uff1f2X^2+1=3X
2X^2-3X+1=0
X^2-3/2X+1/2=0
X^2-3/2X=-1/2
X^2-3/2X+9/16=-1/2+9/16
(X-3/4)^2=1/16
X-3/4=\u6b63\u8d1f1/4
X1=1
X2=1/2
X^2\u5c31\u662fX\u7684\u5e73\u65b9 \u6211\u6253\u4e0d\u51fa\u6765
\u5982\u679c\u6ee1\u610f\u8bf7\u70b9\u51fb\u53f3\u4e0a\u89d2\u8bc4\u4ef7\u70b9\u3010\u6ee1\u610f\u3011\u5373\u53ef~~
\u4f60\u7684\u91c7\u7eb3\u662f\u6211\u524d\u8fdb\u7684\u52a8\u529b~~
\u7b54\u9898\u4e0d\u6613..\u795d\u4f60\u5f00\u5fc3~(*^__^*) \u563b\u563b\u2026\u2026
3x²=2x\uff0b1
3x²\uff0d2x\uff0d1=0
(x\uff0d1)(3x\uff0b1)=0
x=1\u6216x=\uff0d1/3
(2x-1)(x-1)=0
解得：x=1/2或1
移项得
2X平方-3X+1=0
从而得
(2X-1)(X-1)=0
X1=0.5 X2=1
2x²+1=3x
2x²-3x+1=0
（2x-1）（x-1）=0
x=1/2或x=1
绛旓細鍥炵瓟锛歺^2-3x+1=0 2(x-3/4)^2-1/8=0 (x-3/4)^2=1/16 x-3/4=1/4鎴-1/4 x=1鎴1/2
绛旓細x^2-3x+1=0 2(x-3/4)^2-1/8=0 (x-3/4)^2=1/16 x-3/4=1/4鎴-1/4 x=1鎴1/2
绛旓細鏂圭▼2x鐨勫钩鏂+1=3x鍙樺舰涓 锛坸-1锛夛紙2x-1锛=0 瑙ｅ緱x1=1锛寈2=1/2
绛旓細2X^2+1=3X 2X^2-3X+1=0 2X -1 锛堜氦鍙夌浉涔橈級X -1 (2X-1)(X-1)=0 X=0.5鎴朮=1
绛旓細鍖栨垚锛2x-1锛夛紙x-1锛=0 鐨剎=1/2鎴杧=1
绛旓細2x²+1=3x 瑙ｏ細2x²+1=3x 2x²-3x=-1 x²锛3x/2锛濓紞1/2 x²锛3x/2+(3/4)²锛濓紞1/2+(3/4)²(x-3/4)²=1/16 x-3/4=卤1/4 x=3/4卤1/4 鍘熸柟绋嬬殑瑙ｄ负锛歺1=3/4+1/4=1锛寈2=3/4-1/4锛1/2 ...
绛旓細2x鐨勫钩鏂+1=3x 2x鐨勫钩鏂-3x+1=0 (2x-1)(x-1) = 0 x1=1/2锛寈2=1
绛旓細2x^2-3x+1=0 (2x-1)(x-1)=0 瑙ｅ緱锛歺=1/2鎴1
绛旓細2x鐨勫钩鏂+1锛3x x^2-3x/2+1/2=0 x^2-3x/2+9/4=9/4-1=5/4 (x-3/2)^2=5/4 x=3/2卤鏍瑰彿5/2
绛旓細2x²-3x=-1 x²-3/2x=-1/2 x²-3/2x+9/16=1/16 (x-3/4)²=1/16 x-3/4=卤1/4 x1=1, x2=1/2
