Question

Equação de 2° grau F(×) = ײ-3× -54

Answer 1

3×3-4×1-54

9+216=225

-(-3)+V225

2×1

3+15=18=9

2 2

3-15=-12=-6

2 2

Answer 2

x²-3x-54=0
Δ=(-3)²-4.1.(-54)
Δ=9+216
Δ=225

x=(-(-3)±√225)/2.1
x=(3±15)/2

x’=(3+15)/2
x’=18/2
x’=9

x”=(3-15)/2
x”=-12/2
x”=-6

S={-6,9}

Answer 3

x²-3x-54=0
Δ=(-3)²-4.1.(-54)
Δ=9+216
Δ=225

x=(-(-3)±√225)/2.1
x=(3±15)/2

x’=(3+15)/2
x’=18/2
x’=9

x”=(3-15)/2
x”=-12/2
x”=-6

S={-6,9}