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X^2 = 5^2 + 10^2
x^2 = 25 + 100
x^2 = 125
x^2 = 25 + 100
x^2 = 125
Answer:
C.
Step-by-step explanation:
So we have the equation:
This is a square root equation.
For square root equations, the radicand(s) <em>must</em> be positive.
Therefore, to find the domain, set the radicand to be greater than or equal to 0:
Solve for x. Add 3 to both sides:
Therefore, our domain <em>must</em> be greater than or equal to 3.
In set notation, this is:
Therefore, our answer is C.