Question

Rezolvati in R ecuatia : ( x -5 )² = x -3. 

Answer 1

($x-5)^{2}$=x-3
$x^{2}$-10x+25-x+3=0
$x^{2}$-11x+28=0
Δ=121-112=9
$x_{1}$=$\frac{11+3}{2}$=7
$x_{2}$=$\frac{11-3}{2}$=4

S={4;7}