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2a. f(x)=-3x-7
-3x-7=0
x=
Miejsce zerowe dla x=.
2b. f(x)=4x+14
4x+14=0
x=
Miejsce zerowe dla x=
zad 2
y = - 3x - 7
za y wstawiamy 0
0 = - 3x - 7
- 3x = 7
3x = - 7
x₀ = - 7/3 = - 2 1/3
0 = 4x + 14
4x = - 14
x₀ = - 14/4 = - 3 2/4 = - 3 1/2