Răspunsuri

2014-11-15T14:53:30+02:00
 \frac{1250}{x^{2}+25}  = 10  \\  \\ 1250 = 10x^2 + 250 \\ \\ 1000 = 10x^2 \\ 100= x^2 \\ x = 10

Am adus la numitor comun 10 cu x^2+25
nu a ajuns la fractii
Atunci facem asa :

1250:(x^2+25)=10
1250 = 10*(x^2+25)
1250=10x^2+250
1000 = 10x^2
100=x^2
x=10