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MineWineLainen
@MineWineLainen
July 2022
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помогите с 10 номером
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sedinalana
Verified answer
ОДЗ
(5-x)(5+x)≥0
x=5 x=-5
x∈[-5;5]
a²-2b²=ab
a²-ab-2b²=0
Решим относительно а
D=b²+8b²=9b²
a1=(b-3b)/2=-b⇒
нет решения
a2=(b+3b)/2=2b⇒
x+5=320-64x
x+64x=320-5
65x=315
x=63/13=4 11/13
1 votes
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Answers & Comments
Verified answer
ОДЗ(5-x)(5+x)≥0
x=5 x=-5
x∈[-5;5]
a²-2b²=ab
a²-ab-2b²=0
Решим относительно а
D=b²+8b²=9b²
a1=(b-3b)/2=-b⇒ нет решения
a2=(b+3b)/2=2b⇒
x+5=320-64x
x+64x=320-5
65x=315
x=63/13=4 11/13