plzhelpmeasap46
plzhelpmeasap46 plzhelpmeasap46
  • 23-05-2019
  • Mathematics
contestada

X^2+11=36

X^2-25/x+5 =0

What is the value of x for both



Respuesta :

gmany
gmany gmany
  • 28-05-2019

Answer:

x = 5

Step-by-step explanation:

[tex]x^2+11=36\qquad\text{subtract 11 from both sides}\\\\x^2=25\to x=\pm\sqrt{25}\\\\x=-5\ or\ x=5\\============================\\\\\dfrac{x^2-25}{x+5}=0\qquad Domain:\ x+5\neq0\to x\neq-5\\\\\dfrac{x^2-25}{x+5}=0\to x^2-25=0\qquad\text{add 25 to both sides}\\\\x^2=25\to x=-5\notin D\ or\ x=5\in D[/tex]

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