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A square has an area of 16x^2+40x+25. Find the length of a side. Make a sketch of the square.
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area=x^2 16x^2+40x-25=x^2 15x^2+40x+25=0
find x using quadratic formula or by factorization
5(3x^2+8x+5)=0 5(x+1)(3x+5)=0 x=-1 or x=-3/5
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