CoriLuu
CoriLuu CoriLuu
  • 03-05-2016
  • Mathematics
contestada

Select the correct difference. -3z^7 - (-5z^7)

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apologiabiology
apologiabiology apologiabiology
  • 03-05-2016
remember
x-(-y) means x+y since minusing a negative cancels

-3z^7+5z^7
addthe coeficients
one way to show is undistribute
-3z^7+5z^7=(z^7)(-3+5)=(z^7)(2)=2z^7

answer is 2z^7
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