Question

determinar as razões da equação x²-2x+2=0​

Answer 1

$\sf{x^2-2x+2=0}\\\sf{a=1~~~b=-2~~~c=2}\\\sf{\Delta=b^2-4ac}\\\sf{\Delta=(-2)^2-4\cdot1\cdot2}\\\sf{\Delta=4-8}\\\sf{\Delta=-4\textless0}\\\sf{S=\varnothing}$