Question

.Dada a equação 9x² + 27x – 360 = 0, encontre as raízes. me ajudem pfvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Answer 1

Resposta:

as raízes são -8 e 5

Explicação passo-a-passo:

a=9;b=27;c=-360

∆= b²-4.a.c

∆= 27²-4.9.(-360)

∆=729+12.960

∆= 13.689

x=-b±√∆

2.a

x= -(+27)±√13.689

2.9

x= -27±117

18

x¹= -27-117. x¹= -144. x¹= -8

18. 18

x²= -27+117. x²= 90. x²= 5

18. 18