Question

x²+6×+9=0 resultado ??​

Answer 1

x²-6x+9=0 (Fórmula de Bhaskara)

onde:

a=1

b=-6

c=9

Δ=b²-4.a.c

Δ=(-6)²-4.1.9

Δ=36-36

Δ=0

x=+6+/-0/2

Logo:

x1=3

x2=3

Answer 2

Resposta:

$x^{2} +6x+9=0\\ \\ \\ a=1,b=6,c=9\\ \\ \\ delta=b^{2} -4.a.c\\ \\ \\ delta=6^{2} -4.1.9\\ \\ delta=36-36\\ \\ delta=0\\ \\ \\ x=\frac{-b+-\sqrt{delta} }{2.a} \\ \\ \\ x=\frac{-6+-\sqrt{0} }{2} \\ \\ x=-\frac{6 }{2} \\ \\ x=-3$