Answer:
Among the given options the expression which is a radical equation is:
[tex]7\sqrt{x}=14[/tex]
Step-by-step explanation:
An equation in terms of a variable is said to be a radical equation if the variable is present inside a radical sign.
a)
[tex]x+\sqrt{5}=12[/tex]
This is not a radical equation since the variable x is not under the radical sign.
Hence, option: a is incorrect.
b)
[tex]x^2=16[/tex]
This is a quadratic equation and not a radical equation.
Hence, option: b is incorrect.
c)
[tex]3+x\sqrt{7}=13[/tex]
From the equation we see that a constant is present in a radical sign and not the variable.
Hence, option: c is incorrect.
d)
[tex]7\sqrt{x}=14[/tex]
This is a radical equation as the variable is present in the radical sign.
