The total bill (parts and labor) for the repair of a car was $458. The cost of parts was $339. The cost of labor was $34 per hou
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If the sides of the larger square are 3 in more than the sides of the smaller square, then the measure of the smaller square is x and the larger is x+3. Area is side*side. So the area for the smaller square is x*x or x^2. The area for the larger is (x+3)(x+3) which is x^2+6x+9. The sum of these areas is 425. Here's what that looks like: 
which simplifies a bit to 
. In order to solve for x we have to get everything on the same side, combine like terms, set the quadratic equal to 0, and then factor. 
. Plug that into the quadratic formula and you will get x values of 13 and -16. The two things in math that will never EVER be negative are time and distance/length, so we know that the side length cannot possibly be -16, so it has to be 13. The length of a side for the smaller square then is 13, and 16 for the larger.