Question

Ajutor! E urgent!
Multimea solutiilor ecuatiei (x+1) totul la a doua -1 = 3 este S={...}

Answer 1

[tex](x+1)^2-1=3\\ x^2+2x+1-1=3\\ x^2+2x=3\\ x^2+2x-3=0\\ \Delta=16\Rightarrow x_{1;2}=\dfrac{-2\pm 4}{2}=-1\pm2\Rightarrow x_1=1 ,\; x_2=-3\\ S=\lbrace -3,1\rbrace[/tex]