Question

x²+3x+5=0 equação de 2grau,sendo U=IR

Answer 1

$x^{2} +3x+5=0 \\ \\ a=1 \\ b=3 \\ c=5 \\ \\ \Delta=b^2-4ac \\ \Delta=3^2-4(1)(5) \\ \Delta=9-20 \\ \Delta=-11 \\ \\ como~~\Delta~~\'e~~negativo~~e~~\notin~R \\ \\ S=\emptyset~~conjunto~~vazio$