Respuesta :

[tex]x = \sqrt{y-7}[/tex]

Step-by-step explanation:

Given equation is

[tex]y = x^{2} +7[/tex]

⇒[tex]x^{2} +7 =y[/tex]

⇒[tex]x^{2} =y -7[/tex]

square rooting both sides

⇒[tex]x = \sqrt{y-7}[/tex]