Answer:
Step-by-step explanation:
x2 + 5x + 4 Â (the area of the rectangle)
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x + 2 Â (the length of one side)
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(x2 + 5x + 4)/(x + 2)
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do a division of this polynomial and you get; Â Â (x + 3) - 2/(x+2), you could leave the answer like this or you could simplify by using the LCM method
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= [(x+2)(x+3) - 2]/(x + 2)
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checking; (x + 2)*[(x+2)(x+3) - 2]/(x + 2) = (x+2)(x+3) - 2 = x2 +5x + 6 - 2 = x2 +5x + 4 (proven)