Question

calcule as raízes
${x}^{2} - 5x = 0$
$2 {x}^{2} - 8x = 0$
$6 {x}^{2} = 5x$
me ajudem
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Answer 1

x² - 5x = 0

x(x - 5) = 0

x = 0

ou

x - 5 = 0

x = 5

2x² - 8x = 0

2x(x - 4) = 0

2x = 0

x = 0/2

x = 0

ou

x - 4 = 0

x = 4

6x² = 5x

6x² - 5x = 0

x(6x - 5) = 0

x = 0

ou

6x - 5 = 0

6x = 5

x = 5/6

Answer 2

Resposta:

Explicação passo-a-passo:

A)

x^2-5x = 0

x.(x-5)= 0

x = 0

x-5= 0

x = 5

R.: {0; 5}

B)

2x^2-8x = 0 (:2)

x^2 - 4x = 0

x.(x-4)= 0

x = 0

x-4= 0

x = 4

R.: {0; 4}

C)

6x^2 = 5x

6x^2 - 5x = 0

x.(6x - 5) = 0

x = 0

6x-5= 0

6x = 5

x = 5/6

R.: {0; 5/6}