Respuesta :
Answer:
It's 7√x = 14.
Step-by-step explanation:
That would be 7√x = 14.
In a radical equation the variable (x) is under a radical sign.
The equations x + √5 = 12 and 3 + x√7 = 13 contain radicals but they are radicals of a constant. The equation x^2 = 16 does not contain a radical.
The completed question is :
Which of the following is a radical equation?
1. [tex]$ x+\sqrt{5}=12$[/tex]
2. [tex]$x^{2} =16$[/tex]
3. [tex]$3+x \sqrt{7}=13$[/tex]
4. [tex]$7 \sqrt{x}=14$[/tex]
Answer
[tex]$7 \sqrt{x}=14$[/tex] is a radical equation.
What is a radical equation?
A radical equation is an equation that has a variable under the radical.
From the given options we have the radical square root
We need to choose an option that has a variable under the square root.
1. [tex]$ x+\sqrt{5}=12$[/tex]
This equation has 5 under the radical square root. Variable is outside, So this is not a radical equation.
2. [tex]$x^{2} =16$[/tex]
Here there is no radical. So this is not a radical equation.
3. [tex]$3+x \sqrt{7}=13$[/tex]
This equation has 7 under the radical square root. Variable is outside, So this is not a radical equation.
4. [tex]$7 \sqrt{x}=14$[/tex]
This equation has [tex]$x$[/tex] under the radical square root. So this is a radical equation.
To learn more about the radical equation
https://brainly.com/question/8843928
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