Question 902111
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Hi,
     *[illustration rectangle.png].
A = (10cm)(25cm) = 250cm^2
Question States***
A = (10cm + x)(25cm + x) = 500cm^2
x^2 + 35x - 500 = 0   (Tossing out the negative solution for unit measure)
 *[invoke quadratic "x", 1, 35,-500]