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Яна56467
@Яна56467
July 2022
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Помогите . !!!7 класс!!! Решите уравнение :
x ² -81=0
y ² -1 =0
--
2
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Answers & Comments
tpoden
1) х=9 х=-9
2) у = 1/2 у= -1/2
2 votes
Thanks 0
bibi17
1)у^2-81=0
у^2=81
у=+и-√81
у=9
у=-9
2).у^2-1=0
у^2=1
у=+и-√1
у=1
у=-1
2 votes
Thanks 0
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Answers & Comments
2) у = 1/2 у= -1/2
у^2=81
у=+и-√81
у=9
у=-9
2).у^2-1=0
у^2=1
у=+и-√1
у=1
у=-1