Question

calcule o discrimiminante de cada equaçao e analisar as raizes em cada caso
x2+9x+8=0

Answer 1

$x^{2} +9x+8=0 \Delta= b^{2} -4.a.c/2.a= \Delta =9^{2} -4.1.8= \Delta=81-32=49$
$x^{1} =-+9 \sqrt{49} /2=-9-7/2=-16/2=-4$
$x^{2} -+9 \sqrt{49} /2=-9+7=-2/2=-1$

S{-4,-2}