1.若x^2+3x-1=0,则x-3/3x^2-6x÷(x+2 - 5/x-2)=________.
问题描述:
1.若x^2+3x-1=0,则x-3/3x^2-6x÷(x+2 - 5/x-2)=________.
2.若m/a^2-b^2 - 2ab-b^2/a^2-b^2 = a-b/a+b,则m=_______.
答
1,1/3
2,m=a^2+2b^2