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Groovik
@Groovik
May 2021
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Помогите пожалуйста решить 7 номер
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sedinalana
Verified answer
ОДЗ
{8-5x≥0⇒x≤1,6
{(x-4)(x+4)≥0⇒ x=4 U x=-4 ⇒x≤-4 U x≥4
x∈(-∞;-4]
8-5x=x²-16
x²+5x-24=0
x1+x2=-5 U x1*x2=-24
x1=-8 U x2=3∉ОДЗ
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Answers & Comments
Verified answer
ОДЗ{8-5x≥0⇒x≤1,6
{(x-4)(x+4)≥0⇒ x=4 U x=-4 ⇒x≤-4 U x≥4
x∈(-∞;-4]
8-5x=x²-16
x²+5x-24=0
x1+x2=-5 U x1*x2=-24
x1=-8 U x2=3∉ОДЗ