Question

qual resultado dessa conta x²-6x+9=0 ?

Answer 1

x²-6x+9=0
a= 1 b= -6 c= 9

∆= b^2-4.a.c
∆= (-6)^2-4.1.9
∆= 36-36
∆= 0

x= -b+-✓∆/2a
x= -(-6)+-✓0/2.1
x= +6+-0/2

x' e x"= 6/2
x' e x"= 3

S= {3}

Answer 2

x² - 6x + 9 = 0

A= 1

B= - 6

C= 9

∆= b² - 4ac

∆= ( - 6)² - 4 • 1 • 9

∆= 36 - 36

∆= 0

x= - b ± √∆ / 2a

x= - ( - 6) ± √0 / 2 • 1

x= 6 ± 0/2

x' e x"= 6 ± 0/2 = 6/2 = 3

S= ( 3 )