Question

26 x - 9 x elevado a 2 - 17 = 0​

Answer 1

26x - 9x² - 17 = 0

-9x² + 26x - 17 = 0

a = - 9

b = 26

c = - 17

∆ = b² - 4 . a . c

∆ = 26² - 4 . (-9) . (-17)

∆ = 676 - 612

∆ = 64

x = - b ± √∆

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2a

x' = - 26 - 8

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2 . (-9)

x' = - 34 (÷2)

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- 18. (÷2)

x' = 17

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9

x" = - 26 + 8

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2 . (-9)

x" = - 18

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- 18

x" = 1

S = {17/9 , 1}