Question

f (x)= -x2+2x-2
f (x)= x2+2x+2 me socorre aí
usando o Delta, bhaskara

Answer 1

x²+2x+2=0
Δ=2²-4.1.2
Δ=4-8
Δ=-4

S={ x ∉ R}

-x²+2x-2
Δ=2²-4.-1.-2
Δ=4-8
Δ=-4

S={ x ∉ R}