(19x-x^2)/(x+1)*(x+(19-x)/(x+1)=84
2个回答

解X么

(19x-x²)/(x+1)*19/(x+1)=84

(361X-X²)/(X+1)²-84(X+1)²/(X+1)²=0

(361X-X²-84X²-168X-84)/(X+1)²=0

(84X²-93X+84)/(X+1)²=0

无实数解