Question

log (4,5-x)=log 4,5-log x

Answer 1

Ответ:

1,5 и 3

Объяснение:

$log (4,5-x)=log 4,5-log x;\\log (4,5-x)=log (\frac{4,5}{x} )\\4,5-x=\frac{4,5}{x} \\4,5x-x^{2} =4,5\\x^{2}-4,5x+4,5 =0\\D=20,25-18=2,25\\x1=\frac{4,5+1,5}{2} =3;\\x2=\frac{4,5-1,5}{2} =1,5;$