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X(do kwadratu)-X(do kwadratu)-10x<-25
-10x<-25/:(-10)
x>2,5
Zad3 5 pierwiastków z 2
Zad4 12x+3x=o 15x=0
x² + 5x - 5x - 25 < x² - 10x + 25
10x <50 /:10
x<5
2)
2 + pierw(3) / 2 - pierw(3) =
2 + pierw(3) / 2 - pierw(3) * 2 + pierw(3) / 2 + pierw(3) =
4 + pierw(9) / 4 - pierw(9) =
- 12/5 = -2 2/5
3)
20:2
10:2
5:5
Odp. 2 pierwiastki z 5
4)