Question

Como calcular as raizes das equacoes: d)x^2-3x-10=0 e)x^2-4x-5=0
f)x^2+8x+20=0 g)9x^2+6x+1=0
h)x^2+5x+6=0 i)x^2-6x-16=0
j)6x^2-x-5=0 k)25x^2+10x+1=0 ?

Answer 1

f)a=1,b=8,c=20
delta=64-4.1.20
delta=4
x1=-3,x2=-5
g)a=9,b=6,c=1
delta=36-4.9.1
delta=0
x1=-1/3,x2=-1/3
h)a=1,b=5,c=6
delta=25-4.1.6
delta=1
x1=-2,x2=-3
i)a=1,b=-6,c=-16
delta=36-4.1.(-16)
delta=100
x1=8,x2=-2
j)a=6,b=-1,c=-5
delta=1-4.6.(-5)
delta=121
x1=2,x2=-5/2
k)a=25,b=10,c=1
delta=100-4.25.1
delta=0
x1=-2/5,x2=-2/5