| ⎧ | y=2x2+4x−1 | |
| ⎩ | y=−x2+5x+3 |
Graficznie
y = 2x2 + 4x − 1
Δ = 16 + 8 = 24
√Δ = 2√6
| −4 + 2√6 | −2 + √6 | |||
x1 = | = | ≈ 0,22 | ||
| 4 | 2 |
| −4 − 2√6 | −2 − √6 | |||
x2 = | = | ≈ −2,22 | ||
| 4 | 2 |
| −24 | ||
q = | = − 3 | |
| 8 |
| −5 − √37 | ||
x1 = | ≈ 5,54 | |
| −2 |
| −5 + √37 | ||
x2 = | ≈ −0,54 | |
| −2 |
| 1 | ||
q = 9 | ||
| 4 |
| 1 + 7 | 8 | 8 | ||||
x1 = | = | => y = 7 | ||||
| 6 | 6 | 9 |
| 1 −7 | ||
x2 = | = −1 => y = −3 | |
| 6 |