Question

X^2+11=36

X^2-25/x+5 =0

What is the value of x for both

Answer 1

x = 5

Explanation:

`x^2+11=36\qquad\text{subtract 11 from both sides}\\\\x^2=25\to x=\pm√(25)\\\\x=-5\ or\ x=5\\============================\\\\(x^2-25)/(x+5)=0\qquad Domain:\ x+5\\eq0\to x\\eq-5\\\\(x^2-25)/(x+5)=0\to x^2-25=0\qquad\text{add 25 to both sides}\\\\x^2=25\to x=-5\\otin D\ or\ x=5\in D`