Question

Simplify this radical expression. Use absolute values when needed

Answer Choices:
a) 4 |x|
b) 4x
c) -4 |x|
d) -4x

Answer 1

\[\sqrt{16x^2}\]

Answer 2

First, you can split the equation into sqrt(16) and sqrt(x^2). Now sqrt of 16 is 4, or negative 4, but don't worry about that, since it's not int the answer choices. Sqrt of x^2 is x or negative x, so that means you must get the absolute value of x.

Answer 3

So it would be A right?

Answer 4

Yes, good job!

Answer 5

Thank you!!! :)

Answer 6

so ok but can you tell me why not is right +/- 4x so from these two choises every two ?

Answer 7

@ShadowRatchet6 so why ????

Answer 8

because 4x squared = 16x^2 yes ?

ok but (-4x)^2 =16x^2 too

so than why not is right every two cheoises ?

Answer 9

This is a function, so if you graph it, only the solid line is present, that's why you use absolute values.