Question

X² - 6x + 9 = 0 (Resolva pela fórmula resolutiva)

Answer 1

x²-6x+9=0
a=1 b= -6  c= +9
▲= b² -4.a.c= (-6)² -4.(1).(+9)= 36-36=0

x= (-b ± √▲)/2.a
x= (-(-6) ± √0)/2.1
x= (+6  ± 0)/2
x'= (6+0)/2= 6/2=3
x"=(6-0)/2= 6/2=3

S= 3

Answer 2

Δ=(-6)²-4·1·9
Δ=36-36
Δ=0