[tex]f(x)=-\frac{1}{4} *(x+4)+6\\\\[/tex]
[tex]0=-\frac{1}{4} *(x+4)+6[/tex]
[tex]0=-\frac{1}{4} x+5[/tex]
[tex]0=-x+20[/tex]
[tex]x=20[/tex]
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[tex]f(x)=-\frac{1}{4} *(x+4)+6\\\\[/tex]
[tex]0=-\frac{1}{4} *(x+4)+6[/tex]
[tex]0=-\frac{1}{4} x+5[/tex]
[tex]0=-x+20[/tex]
[tex]x=20[/tex]
Miejsce zerowe funkcji (punkt przecięcia osia x)
x=20