Ответ:

[tex] \sqrt{5x + 1} = 1 - x \\ 5x + 1 = (1 - x)^{2} \\ 5x + 1 = 1 - 2x + {x}^{2} \\ 7x - {x}^{2} = 0 \\ x(7 - x) = 0 \\ [/tex]

x = 0

7 - x = 0

x = 7

Ответ:

x=0

Объяснение:

5x+1=1-2x+x²

5x=-2x+x²

5x+2x-x²=0

7x-x²=0

x•(7-x)=0

x=0

x=7

√5•0+1=1-0

√5•7+1=1-7

1=1

6= -6

x=0

x≠7

X=0