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mariannaklimenko
@mariannaklimenko
July 2022
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Решите 1-ое уравнение пожалуйста
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sedinalana
Verified answer
(3x-1)/(x+2)-7/(2+x)=(7x²-28)/(x-2)(x+2)-18(x-2)
ОЗ (x-2)(x+2)≠0⇒x≠2 U x≠-2
(x-2)(3x-1)-7(x-2)=7x²-28-18(x+2)
3x²-x-6x+2-7x+14=7x²-28-18x-36
7x²-18x-64-3x²+14x-16=0
4x²-4x-80=0
x²-x-20=0
x1+x2=1 U x1*x2=-20
x1=-4 U x2=5
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Answers & Comments
Verified answer
(3x-1)/(x+2)-7/(2+x)=(7x²-28)/(x-2)(x+2)-18(x-2)ОЗ (x-2)(x+2)≠0⇒x≠2 U x≠-2
(x-2)(3x-1)-7(x-2)=7x²-28-18(x+2)
3x²-x-6x+2-7x+14=7x²-28-18x-36
7x²-18x-64-3x²+14x-16=0
4x²-4x-80=0
x²-x-20=0
x1+x2=1 U x1*x2=-20
x1=-4 U x2=5