A(x-2)+B(X+5)=4X-1
(A+B)X+(5B-2A)=4X-1
A+B=4
5B-2A=-1
A=4-B
5B-2(4-B)=-1
5B-8+2B=-1
7B=7
B=1
A=4-B=4-1=3
已知{x-2}{x+5}分之4x-1等于x+5分之A+ x-2分之B 求AB的值
已知{x-2}{x+5}分之4x-1等于x+5分之A+ x-2分之B 求AB的值
数学人气:602 ℃时间:2020-01-29 17:36:11
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