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2(x%4/5)=1解方程

第六十一回:投鼠忌器宝玉瞒赃,判冤决狱平儿行权

2:(1-X)=4/5 4(1-X)=2*5 4(1-X)=10 1-X=2.5 -X=2.5-1 -X=1.5 X=-1.5

x+1/4=4/5 解:x=4/5-1/4 x=11/20

解: (1)计算 (x+1)(x+2)=x2+3x+2 (x-1)(x-2)=x2-3x+2 (x-1)(x+2)=x2+x-2 (x+1)(x-2)=x2-x+2 (2)特征:计算出的结果二次项x2的序数为1,常数项为常数之积,一次项x的序数为常数之和,用公式表示如下: (x+a)(x+b)=x2+(a+b)x+ab (3)(x+a)(x+...

解:0.5(x-4)=0.1*2 0.5x-2=0.2 0.5x=2.2 x=4.4

x=39/20

x/(x-1) -(x-1)/(x-2) =(x-3)/(x-4) -(x-4)/(x-5) [1+1/(x-1)]-[1+1/(x-2)]=[1+1/(x-4)]-[1+1/(x-5)] 1/(x-1)-1/(x-2)=1/(x-4)-1/(x-5) 1/(x-1)+1/(x-5)=1/(x-4)+1/(x-2) [(x-1)+(x-5)]/[(x-1)(x-5)]=[(x-2)+(x-4)]/[(x-2)(x-4)] (2x-6)/(x^2-6x...

解题方法见图

5.2-2(x-4)=5 5.2-2x+8=5 -2x=5-5.2-8 -2x=-0.2-8 -2x=-8.2 x=4.1

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