Ответ: x=8.
Пошаговое объяснение:
[tex]x-\sqrt{3x+1}=3[/tex]
ОДЗ: 3х+1≥0 3х≥-1 |:3 x≥-1/3.
[tex]\sqrt{3x+1}=x-3[/tex]
ОДЗ: х-3≥0 х≥3 ⇒ х∈[3;+∞).
[tex](\sqrt{3x+1} )^2=(x-3)^2\\\\3x+1=x^2-6x+9\\\\x^2-9x+8=0\\\\x^2-x-8x+8=0\\\\x*(x-1)-8*(x-1)=0\\\\(x-1)*(x-8)=0\\\\x-1=0\\\\x_1=1\notin\\\\x-8=0\\\\x_2=8.[/tex]
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Ответ: x=8.
Пошаговое объяснение:
[tex]x-\sqrt{3x+1}=3[/tex]
ОДЗ: 3х+1≥0 3х≥-1 |:3 x≥-1/3.
[tex]\sqrt{3x+1}=x-3[/tex]
ОДЗ: х-3≥0 х≥3 ⇒ х∈[3;+∞).
[tex](\sqrt{3x+1} )^2=(x-3)^2\\\\3x+1=x^2-6x+9\\\\x^2-9x+8=0\\\\x^2-x-8x+8=0\\\\x*(x-1)-8*(x-1)=0\\\\(x-1)*(x-8)=0\\\\x-1=0\\\\x_1=1\notin\\\\x-8=0\\\\x_2=8.[/tex]