Question

encontre o valor de A sendo A: 2x² - 2x + x - 1​

Answer 1

Resposta:

2x² - 2x + x - 1 = 0

2x² - x - 1 = 0

x = -(-1)±√(-1)²-4(2)(-1)

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2 • 2

x = 1 ± √1 + 8

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4

x = 1±√9

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4

x = 1±3

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4

x' = 1+3/4 = 4/4 = 1

x" = 1-3/4 = -2/4 = -1/2