Question

Aflați x din:
radical din 400 -64•radical din 16 supra x =2radical din 81+7•3²supra 2 si 1 supra 4 •radical din 1(7)​

Answer 1

Răspuns:

$\sqrt{400}$ - 64* $\frac{\sqrt{16} }{x}$= 2* $\sqrt{81}$+ 7*$\frac{3^{2} }{2}$ + $\frac{1}{4} * \sqrt{1,(7)}$

<=> 20- 64*$\frac{4}{x}$ = 2*9 + $\frac{63}{2}$ + $\frac{1}{4}$ * $\sqrt{\frac{16}{100} }$

<=> 20- 64* $\frac{4}{x}$ = 18+ $\frac{63}{2}$+ $\frac{1}{4}$ * $\frac{4}{10}$ | -18

=> 2- 64* $\frac{4}{x}$  = 31,5+ 1/10

=> 2- 64* $\frac{4}{x}$  = 31,6 |-2

=> -64* $\frac{4}{x}$  =29,6

=> $\frac{256}{x}$= -29,6

=> x= -$\frac{256}{29,6\\}$ = - 8,(648)