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24 November, 04:28

Which is equivalent to this expression (z+6) (2z^2+3z+5)

a.) z^3+15z^2+23z+30

b.) 2z^3+67z+30

c.) 2z^3+15z^2+23z+30

d.) z^2 + 67z+30

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Answers (1)
  1. 24 November, 04:54
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    (z + 6) (2z^2 + 3z + 5) = z (2z^2 + 3z + 5) + 6 (2z^2 + 3z + 5) = 2z^3 + 3z^2 + 5z + 12z^2 + 18z + 30 = 2z^3 + 15z^2 + 23z + 30
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