cyrusshakeri123
cyrusshakeri123 cyrusshakeri123
  • 20-01-2017
  • Mathematics
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help me with this please I don't understand it !

help me with this please I dont understand it class=

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phfrye4812 phfrye4812
  • 20-01-2017
You would re-write a, b, and f, because when a problem has a double negative it is the same as adding them together. Like for example -8-(-9) you see how there is a double negative there? So it would be re-written as -8+9. 
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