Question

x(x -2)=(x+6) alguém??
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Answer 1

x(x -2)=(x+6)

x² - 2x = x + 6

x² - 2x - x - 6 = 0

x² - 3x - 6 = 0

A= 1

B= - 3

C= - 6

∆= b² - 4ac

∆= ( - 3)² - 4 • 1 • ( - 6)

∆= 9 + 24

∆= 33

x= - b ± √∆ / 2a

x= - ( - 3) ± √33 / 2 • 1

x'= 3 + √33/2

x''= 3 - √33/2

Answer 2

Resposta:

S = {3 - √33/2, 3 + √33/2}

Explicação passo-a-passo:

x · (x - 2) = (x + 6)

x² - 2x = x + 6

x² - 2x - x - 6 = 0

x² - 3x - 6 = 0

∆ = (- 3)² - 4 · 1 · (- 6)

∆ = 9 + 24

∆ = 33

x = - (- 3) ± √33 /2 · 1

x = 3 ± √33/2

x¹ = 3 + √33/2

x² = 3 - √33/2