(x+2)(2x-3)分之5x-1=x+2分之M+2x-3分之N,求M,N的值

问题描述:

(x+2)(2x-3)分之5x-1=x+2分之M+2x-3分之N,求M,N的值

去分母得
5x-1=M(2x-3)+N(x+2)
=(2M+N)x+(2N-3M)
2M+N=5
-3M+2N=-1
∴M=11/7
N=13/7