Question

a)x elevado a 2 -100=0


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Answer 1

x² - 100 = 0

x²= 0 + 100

x²= 100

x= ± √100

x= ± 10

S= ( 10 , - 10)

Answer 2

resolução

${x}^{2} - 100 = 0 \\ {x}^{2} = 100 \\ x = \sqrt{100} \\ x = + - 10$