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Mathematics 9 Online
OpenStudy (anonymous):

a square has an area of 16x^2+40x+25.find the length of a side

OpenStudy (anonymous):

If 16x^2+40x+25 is a perfect square, then 4x + 5 is a factor. check it? yup, it works, because 4x*5*2 gives the middle term. so area comes from side length squared, and the square root pf it is 4x+5, so the side length is 4x+5

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