jesnii jesnii
  • 29-04-2019
  • Mathematics
contestada

Solve for x in the following equation.

Solve for x in the following equation class=

Respuesta :

carlosego
carlosego carlosego
  • 29-04-2019

For this case we must find the value of "x" of the following equation:

[tex]x ^ 2-9 = 0[/tex]

So:

We add 9 to both sides of the equation:

[tex]x ^ 2-9 + 9 = 9\\x ^ 2 = 9[/tex]

We apply square root on both sides of the equation to eliminate the exponent on the left side:

[tex]x = \pm \sqrt {9}[/tex]

Thus, the solutions are:

[tex]x_ {1} = + 3\\x_ {2} = - 3[/tex]

ANswer:

[tex]x_ {1} = + 3\\x_ {2} = - 3[/tex]

Opcion C

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