pomocy
sandra20: pomozcie
! rozwiaz nierownosc
x
2+6x−7≤0
6 kwi 16:57
Klaudia: Δ=b
2−4ac
Δ=6
2−(4*(−7)*1)
Δ=36+28
Δ=64
√Δ=8
| | −b−√Δ | | −6−8 | | −14 | |
x1= |
| = |
| = |
| =−7 |
| | 2a | | 2 | | 2 | |
| | −b+√Δ | | −6+8 | | 2 | |
x2= |
| = |
| = |
| =1 |
| | 2a | | 2 | | 2 | |
6 kwi 17:05
sandra20: a jaki bedzie wykres do tego
6 kwi 17:09
6 kwi 17:17