The area of a square is 16x²+40x+25. Find its side.
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Answer:
16X²+20x+20x+25
or, 4x(4x+5)+5(4x+5)
or,(4x+5)(4x+5)=0
4x+5=0
x=4/5
so area =side²
4/5×4/5=16/25=0.64
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