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OpenStudy (anonymous):
Which of the following represents the area of a rectangle whose length is x – 7 and whose width is x + 12? Answer a.x2 – 84 b.x2 + 5x – 84 c.x2 – 84x + 5s d.x2 – 5x – 84
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OpenStudy (anonymous):
area=l*w area=(x-7)(x+12)
OpenStudy (anonymous):
should be D
OpenStudy (anonymous):
foil it out...you get x^2 -12x + 7x -84 combine like terms you get x^2 -5x -84
OpenStudy (anonymous):
b.x2 + 5x – 84
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