Question

x ao quadrado mais 3x mais 2
por favor me ajuda.

Answer 1

$x^2+3x+2=0\\\\\Delta=(3)^2-4\cdot(1)\cdot(2)\\\Delta=9-8\\\Delta=1\\\\x=\frac{-(3)\pm\sqrt1}{2\cdot1}\to x=\frac{-3\pm1}{2}\\\\x'=\frac{-3+1}{2}=-1\\\\x''=\frac{-3-1}{2}=-2\\\\s=\{-2,-1\}$