Question

X elevado a 2 menos 9x = 0

Answer 1

x² - 9x= 0

a= 1

b= (-9)

c= 0

∆= (-9)² - 4 . 1 . 0

∆= 81 - 0

∆= 81

bhaskara:

-(-9) ± ✓81 / 2.1

-(-9) ± 9 / 2

x¹= 9 + 9 / 2= 18 / 2= 9

x²= 9 - 9 / 2= 0 / 2= 0

S= { 9, 0)