Question

a)x²-9=0
b)16x²-25=0
c)x²-4=0
d)9x²-16=0
e)x²-36=0
f)4x²-16=0
g)x²-64=0

Answer 1

Olá!!!


Resolução!!!


a) x² - 9 = 0

x² = 9
x = ± √9
x = ± 3


S={ -3, 3 }


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b) 16x² - 25 = 0

16x² = 25
x² = 25/16
x = ± √25/16


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c) x² - 4 = 0

x² = 4
x = ± √4
x = ± 2


S={ -2, 2 }


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d) 9x² - 16 = 0

9x² = 16
x² = 16/9
x = ± √16/9


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e) x² - 36 = 0

x² = 36
x = ± √36
x = ± 6

S={ -6, 6 }

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f) 4x² - 16 = 0

4x² = 16
x² = 16/4
x² = 4
x = ± √4
x = ± 2


S={ -2, 2 }


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g) x² - 64 = 0

x² = 64
x = ± √64
x = ± 8


S={ -8, 8 }




★Espero ter ajudado!!!