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2y+3y²-2-3y < (3y-21)(y-5)
3y²-y-2 < 3y²-15y-21y+105
3y²-3y²-y+36y < 105+2
35y < 107 /:35
y <3 ²/₃₅ - odp A
-1y+3y² -2 <3y²-21y-15y+105
3y² - 3y² -1y+21y+15y <2+105
35y< 107 /:35
y< 3,05
odp.C