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16agilstrap1 16agilstrap1
  • 10-06-2016
  • Mathematics
Answered

If x2 - 4 = 45, then x could be equal to

9

3

5

-7

-4

Verified Answer :

ImpatientAngel
ImpatientAngel ImpatientAngel
  • 10-06-2016

\(x^{2} - 4 = 45\)

\(x^{2}\) = 45 + 4

\(x^{2}\) = 49

\(\sqrt{ x^{2} } = \sqrt{49}\)

x = 7

Answer Link
Anonymous Anonymous
  • 14-06-2016

Hi:))

x² - 4 = 45

X² = 45 + 4

X² = 49

√x² = √49

x = 7

Answer Link

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