Question

已知实数m,n满足m的平方-3m-9=0,9n的平方+3n-1=0,则m+1/n=?

Answer 1

m^2-3m-9=0

b^2-4ac=9+36=45

x=（-b±根号45）/2a

m1=（3+3根号5）/2

m2 =（ 3-3根号5）/2

9n的平方+3n-1=0

b^2-4ac=9+36=45

x=（-b±根号45）/2a

n1=（-1-根号2）/6

n2 =（-1+根号2）/6

m+1/n=?

结果自己带