Сократите дробь:

5 х^2-9 х-2/10 х^2+22 х+4

5x²-9x-2=0

D=81+40=121

x1 = (9-11) / 10=-1/5

x2 = (9+11) / 10=2

10x²+22x+4=0

D=484-160=324

x1 = (-22-18) / 20=-2

x2 = (-22+18) / 20=-1/5

(5 х^2-9 х-2) / (10 х^2+22 х+4) = 5 (x+1/5) (x-2) / 5 (x+1/5) (x+20 = (x-2) / 9x=20