方程x^2=1的解
(x+1)^2+x-2=1\u8fd9\u9053\u65b9\u7a0b\u600e\u4e48\u89e3\u554a\uff01\uff01\uff01\uff01(x+1)/(x-2)+1/(x+1)=1
(x-2+3)/(x-2)+1/(x+1)=1
(x-2)/(x-2)+3/(x-2)+1/(x+1)=1
1+3/(x-2)+1/(x+1)=1
3/(x-2)+1/(x+1)=0
3(x+1)/(x+1)(x-2)+(x-2)/(x+1)(x-2)=0
[3(x+1)+(x-2)]/(x+1)(x-2)=0
[3x+3+x-2]/(x+1)(x-2)=0
(4x+1)/(x+1)(x-2)=0
4x+1=0
x=-1/4
\u7ecf\u68c0\u9a8cx=-1/4\u662f\u65b9\u7a0b\u7684\u89e3
1.2X\u20142.4=X
0.2X=2.4
X=12
2.x^2=1的解是x=1; 错，是正负1
3.x=1或x=2是x^2=1的解; 对
4.x=1或x=-1或x=2是x^2=1的解; 对
5.x^2=1的解是x=1或x=-1或x=2; 错
1.x=1是x^2=1的解; ×
2.x^2=1的解是x=1; √
3.x=1或x=2是x^2=1的解; ×
4.x=1或x=-1或x=2是x^2=1的解; ×
5.x^2=1的解是x=1或x=-1或x=2; ×
1 and 4
1对
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绛旓細x1x2=1 鑰冩煡 鍙嶅嚱鏁拌В鏋愬涓 鏈夊府鍔╄鍙婃椂閲囩撼鍝 璋㈣阿
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绛旓細aY²+b=0 X1=-2 X2=1 a锛圶+m+2锛²+b=0 a(m-2)²+b=0 a(m+1)²+b=0 a锛圶+2.5锛²+b=0 瑙ｅ緱m=0.5 b=-2.25a aX²+5aX+6.25a+b=0 aX²+5aX+6.25a-2.25a=0 aX²+5aX+4a=0 鐢变簬路涓嶄細涓浜...
