16agilstrap1 16agilstrap1

10-06-2016
Mathematics

contestada

If x2 - 4 = 45, then x could be equal to
9
3
5
-7
-4

Respuesta :

ImpatientAngel ImpatientAngel

10-06-2016

[tex] x^{2} - 4 = 45[/tex]

[tex] x^{2} [/tex] = 45 + 4

[tex] x^{2} [/tex] = 49

[tex] \sqrt{ x^{2} } = \sqrt{49} [/tex]

x = 7

Answer Link

Аноним Аноним

14-06-2016

Hi:))

x² - 4 = 45

X² = 45 + 4

X² = 49

√x² = √49

x = 7

Answer Link

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