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p = -b/2a
q = -Δ/4a
Δ = b² - 4ac
a) Więc:
4 = -b/2 |*2
8 = -b
b = -8
0 = -Δ/4 |* 4
Δ = 0
Δ = 64 - 4c
0 = 64 - 4c
4c = 64 |/4
c = 16
2. Drugi przykład robisz analogicznie. Wszystko tak samo, tylko podstawiasz inne wartości.