Question

x elevado a 2 -4 x -6 =0 ​

Answer 1

Resposta:

x²-4x-6 = 0

Δ = b² - 4.a.c

Δ = -4² - 4 . 1 . -6

Δ = 16 - 4. 1 . -6

Δ = 40

Há 2 raízes reais.

x = (-b +- √Δ)/2a

x' = (--4 + √40)/2.1

x' = 10,32455532033676 / 2

x' = 5,16227766016838

x'' = (--4 - √40)/2.1

x'' = -2,324555320336759 / 2

x'' = -1,1622776601683795

Answer 2

Resposta:

Explicação passo-a-passo:

X elevado a 2 -4 x -6 =0 ​

x^2 - 4x - 6 = 0

a = 1; b = - 4; c = - 6

∆ = b^2 - 4ac

∆ = (-4)^2 - 4.1.(-6)

∆ = 16 + 24

∆ = 40

40:2

20:2

10:2

5:5

1

√∆ = √4.√10 = 2√10

x = [ - b +/- √∆]/2a

x = [ -(-4)+/- 2√10]/2.1

x = [4 +/- 2√10]/2

x = 4/2 +/- 2√10/2

R.:

x' = 2+√10

x" = 2 - √10