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OpenStudy (anonymous):
Find the product. (-d + 4)(-d - 4) a) -d² - 16 b) d² - 16 c) d² + 16 d) d² - 8d - 16
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OpenStudy (anonymous):
Hello!! do you need help
OpenStudy (anonymous):
yes
OpenStudy (radar):
Use FOIL method. -d*-d=d^2, -d*-4=4d, 4*-d=-4d, 4*-4=-16 combine the products getting: d^2+4d-4d-16 simplifying results in d^2-16 choice B
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