Question

Resolver as equação do 2°grau: x^2 + 4x -4 = 0 

Resolver a equação x^2 – 4 = 0 

preciso de cálculo ​

Answer 1

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A)

x² + 4x - 4 = 0

x = -4 ± √4² - 4(1)(-4)

2(1)

x = -4 ± √16 + 16

2

x = -4 ± √32

2

x = -4 ± √16 × 2

2

x = -4 ± 4√2

2

x = -2 ±2√2

x¹ = -2 + 2√2

x² = -2 - 2√2

S = {-2 + 2√2 ; -2 - 2√2 }

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B)

x² - 4 = 0

x² = +4

x = ±√4

x¹ = 2

x² = -2

S = { 2 ; -2 }

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Att: MarcosPCV