Question

Rezolvati in R ecuatia prin medota grafică:, √x = x-3

Answer 1

[tex]\sqrt x=x-3 |()^2\\ x=x^2-6x+9\\ x^2-7x+9=0\\ \Delta=49-4\cdot9\\ \Delta=13\Rightarrow \sqrt{\Delta}=\sqrt{13}\\ Din\ proprietatile\ radicalului\ avem\ ca\ x \geq 0.\\ x_1=\frac{7-\sqrt{13}}{2}(\ \textgreater \ 0)\\ x_2=\frac{7+\sqrt{13}}{2}(\ \textgreater \ 0)\\ [/tex]

Answer 2

Am reprezentat in plan graficele functiilor din cei doi membrii.