(2M-N)X²+3X-2(MX²-NX+6)的取值与X的取值无关 求M,N
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![(2M-N)X²+3X-2(MX²-NX+6)的取值与X的取值无关 求M,N](/uploads/image/z/5301869-5-9.jpg?t=%282M-N%29X%26%23178%3B%2B3X-2%28MX%26%23178%3B-NX%2B6%29%E7%9A%84%E5%8F%96%E5%80%BC%E4%B8%8EX%E7%9A%84%E5%8F%96%E5%80%BC%E6%97%A0%E5%85%B3+%E6%B1%82M%2CN)
(2M-N)X²+3X-2(MX²-NX+6)的取值与X的取值无关 求M,N
(2M-N)X²+3X-2(MX²-NX+6)的取值与X的取值无关 求M,N
(2M-N)X²+3X-2(MX²-NX+6)的取值与X的取值无关 求M,N
-3x^2+mx+nx^2-x+6=(-3+n)x^2+(m-1)x+6
要使取之于x无关,只要-3+n=0,m-1=0,即n=3,m=1