Question

x ao quadrado-6x +9 =0

Answer 1

x²-6x+9=0
∆=(-6)²-4 .1 . 9
∆=36-36
∆=0

x'=6+0÷2=3

x"=6-0÷2=3

S={3}

Answer 2

x² - 6x + 9 = 0

Δ = (- 6)² - 4 . 1. 9

Δ = 36 - 36

Δ = 0

β = - (- 6) + - √0 / 2 . 1

x = 6 / 2

x = 3