Asked by Anonymous

The area of a square is 40 in². If the length of each side of the square is 2x in., what is the value of x?
Answered by Steve
well, (2x)^2 = 40, right?
so, ...
Answered by Anonymous
Would you divide 40 by 2? Then, that would be 20. So, it is now x²=20. Would you then find the square root of 20?
Answered by Steve
no, (2x)^2 = (2x)(2x) = 4x^2, so
4x^2 = 40
x^2 = 10
x = √10
Answered by Steve
or, you could work it by doing this:

area is 40, so side is √40

2x = √40 = 2√10
so, x=√10
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