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Meeno1
@Meeno1
July 2022
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Помогите с алгеброй 1 вариант. Заранее спасибо
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2000ru
4) х+7=(1+х)^2
х+7=1+2х+х^2
х+7-1-2х-х^2=0
х+6-2х-х^2=0
-х^2-х+6=0
х^2+х-6=0
Д=b^2-4ac=(1)^2-4*1*(-6)=1+24=25=5^2>0
x1=-b-5/2= -1-5/2=-6/2=-3
х2=-1+5/2=4/2=2
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Answers & Comments
х+7=1+2х+х^2
х+7-1-2х-х^2=0
х+6-2х-х^2=0
-х^2-х+6=0
х^2+х-6=0
Д=b^2-4ac=(1)^2-4*1*(-6)=1+24=25=5^2>0
x1=-b-5/2= -1-5/2=-6/2=-3
х2=-1+5/2=4/2=2