2x2 + 3x + 1 =0
a=2
b=3
c=1
Δ=b2 − 4ac
Δ=32 − 4*2*1
Δ=9−8
Δ=1
√Δ=1
| −b− √Δ | ||
x1 = | ||
| 2a |
| −3−1 | ||
x1 = | ||
| 2*2 |
| −4 | ||
x1 = | = −1 | |
| 4 |
| −b+ √Δ | ||
x2 = | ||
| 2a |
| −3+1 | ||
x2 = | ||
| 2*2 |
| −2 | ||
x2 = | = −2 | |
| 4 |
| −2 | 1 | ||
= − | a nie −2 | ||
| 4 | 2 |
| −2 | 1 | ||
= − | a nie −2 | ||
| 4 | 2 |
| 2 | 1 | |||
tam chyba zle sprawdziles bo musi byc | czyli | |||
| 4 | 2 |
X2
| 0 | |
= 6 | |
| 6 |
| −19 | 5 | |||
czy | to −2 | |||
| 7 | 7 |