Question

方程(3/X)+(6/X-6)-(9X+45/X^2-X)=0的解是..

Answer 1

3/X+6/(X-6)-9(X+5)/X(X-1)=0

(3X-18+6X)/X(X+6)=9(X+5)/X(X-1)

9(X-2)/X(X+6)=9(X+5)/X(X-1)

(X-2)(X-1)=(X+5)(X+6)

X方-3X+2=X方+11X+30

14X=-28

X=-2