Question

resolva a equação
a) x^2+6x-8=0
b)x^2+6x+8=0

Answer 1

a)A=1 B=6 C=-8
Δ=36-4.1.-8
Δ=36+32
Δ=68
x=(-b+-√Δ)/2a
x=(-6+-√68)/2
x=-3+-√17
as raizes são -3+√17 e -3-√17
b) A=1 B=6 C=8
Δ=36-4.1.8
Δ=36-32
Δ=4
x=(-6+-√4)/2
x=(-6+-2)/2
x1=(-6+2)/2
x1=-4/2
x1=-2
x2=(-6-2)/2
x2=-8/2
x2=-4