Question

x+(1/x)=5 aflați x^2-(1/x^2) va rooooog​

Answer 1

(x+1/×)totul la a doua=5 la a doua

x la a doua +2•×•1/×+1/× la a doua=25

*simplifici x cu x de unde rezulta

x la a doua +2+1/× la a doua=25

× la a doua+1/× la a doua =25-×

x la a doua +1/x la a doua =23