Question 1048321
<font face="Times New Roman" size="+2">


You are complicating the issue by introducing the second variable and then losing track of what these variables represent.


Let *[tex \Large x] represent the measure of a side of the upper square base.  Then *[tex \Large x^2] is the area of the upper square base.  Also, the measure of a side of the lower square base must be *[tex \Large x\ +\ 21] and the area of the lower square base is *[tex \Large (x\ +\ 21)^2].  Finally, we know that the lower square base is 1869 square feet larger than the upper square base.  Consequently, if you add 1869 to an expression for the area of the upper base, you should have an expression equal to the expression for the area of the lower base, to wit:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ (x\ +\ 21)^2\ =\ x^2\ +\ 1869]


Solve for *[tex \Large x] then calculate *[tex \Large x\ +\ 21]


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

</font>