Respuesta :

dasetka
To solve for a variable, you need to get it (x) by itself.

x² - 14 + 31 = 63   Add 31 to -14
x² + 17 = 63   Subtract 17 from both sides of the equation
x² = 46   Square root both sides
x = [tex]\pm \sqrt{46} [/tex]

Check your work by plugging in [tex] \sqrt{46} [/tex] for x and then [tex]- \sqrt{46} [/tex].

[tex] \sqrt{46} [/tex]² - 14 + 31 = 63   Square [tex] \sqrt{46} [/tex]
46 - 14 + 31 = 63   Subtract 14 from 46
32 + 31 = 63   Add
63 = 63

[tex]- \sqrt{46} [/tex]² - 14 + 31 = 63   Square [tex]- \sqrt{46} [/tex]
46 - 14  + 31 = 63   Subtract 14 from 46
32 + 31 = 63   Add
63 = 63

So, x is [tex] \sqrt{46} [/tex] and [tex]- \sqrt{46} [/tex] .

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