Question

m-6n=20 mn=-6怎么解过程写出来

Answer 1

m-6n=20

m=6n+20

mn=-6

n(6n+20 )=-6

6n^2+20n+6=0

3n^2+10n+3=0

(n+3)(3n+1)=0

n=-3或n=-1/3

当n=-3时

mn=-6

-3m=-6

m=2

当n=-1/3时

mn=-6

-1/3m=-6

m=18

所以m=18,n=-1/3或m=2,n=-3