# Algebra

What is the side length of a square with an area of 144x²?
A.12
B.12x
C.±12x
D.no solution

I think it is C...?

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1. I would also go with C because:

(-12x)(-12x) = 144x^2
(12x)(12x) = 144x^2

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2. Thank you...

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3. It was wrong - it was B...thanks anyhow

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4. You've got me stumped on this one too. I hope you understand why it's option B because I have no idea.

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5. The square root of 144x is 12x

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6. You are WRONG.

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7. Cassie,
It is C unless the domain of x is restricted to positive values. In that case it is B.
The computer or teacher is incorrect based on the information shown here. Why? Well if x =-1, Choice B gives us side= 12*(-1) which is -12. A square cannot have a length of -12. Therefore we’d use -12x for negative values of x.
So it’s not a properly worded question which has led to all the confusion.

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