Respuesta :

zmcever

Answer:

x = 7

Step-by-step explanation:

[tex]x^2 - 9 = 40[/tex]

Add 9 to each side:

[tex]x^2 = 49\\[/tex]

Take the square root of each side:

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

[tex]x = 7\\[/tex]

ciaracrudup

Answer:

7

Step-by-step explanation:

Use this to help you solve it!!! Hope this helps.

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