若mx²-ny²=(x+3y)(x-3y),则m= ,n= .

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若mx²-ny²=(x+3y)(x-3y),则m=,n=.若mx²-ny²=(x+3y)(x-3y),则m=,n=.若mx²-ny²=(x+

若mx²-ny²=(x+3y)(x-3y),则m= ,n= .
若mx²-ny²=(x+3y)(x-3y),则m= ,n= .

若mx²-ny²=(x+3y)(x-3y),则m= ,n= .
mx²-ny²=(x+3y)(x-3y)=x²-9y²
m=1,n=9

mx2-ny2=(x+3y)(x-3y)=x2-9y2
m=1,n=9

因为(x+3y)(x-3y)=x²-9y²=mx²-ny²
对比系数可知:m=1,n=9