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6 November, 13:28

What is a simpler form of the following expressions?

(j + 7) (j - 7)

a. j² + 14j - 49

b. j² - 14j - 49

c. j² + 14j - 49

d. j² - 49

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Answers (1)
  1. 6 November, 13:36
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    J x j = j^2

    j x - 7 = - 7j

    7 x - 7 = - 49

    j x 7 = 7j

    j^2 - 7j + 7j - 49 = D = j^2 - 49
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