Question 1026595
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Each side of a square is increased 4 inches. When this happens, the area is multiplied by 9. How many inches in the side of the original square?
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{{{(x+4)^2}}} = {{{9x^2}}}.


It is what you are given.


Take the square root from both sides. You will get


x + 4 = 3x,  or 2x = 4, or x = 2 in.


Check it.