Question

determine as raizes
x2+9x=0

Answer 1

x² + 9x = 0

Δ= b² - 4ac
Δ= 81- 4.1.(0)
Δ=81

x=(-b+-√Δ)/2a
x=(-9+-9)/2
x¹ = 0, x² = -9

Answer 2

x^2 =0/9
x^2 = 0
x = 0  pois a raiz quadrada de zero é zero