Resposta :
x³-8x²+29x-52=0
z=4
x+y+z=-b/a=8.....x+y+4=8
x+y=4
x.y.z=-d/a=52
x.y.4=52
x.y=13
x²-Sx+P=0
x²-4x+13=0
Δ=b²-4.a.c=
16-52=
-36=36.(-1)=
36i²
√Δ=6i
X=(4±6i)/2
X=2(2±3i)/2
X=2±3i
x=2+3i
y=2-3i
z=4
x+y+z=-b/a=8.....x+y+4=8
x+y=4
x.y.z=-d/a=52
x.y.4=52
x.y=13
x²-Sx+P=0
x²-4x+13=0
Δ=b²-4.a.c=
16-52=
-36=36.(-1)=
36i²
√Δ=6i
X=(4±6i)/2
X=2(2±3i)/2
X=2±3i
x=2+3i
y=2-3i