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  • 15-02-2016
  • Mathematics
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5·cubed squreroot -27+18

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apologiabiology
apologiabiology apologiabiology
  • 15-02-2016
so factor -27
-27=-1 times 3 times 3 times 3
∛(-1 times 3 times 3 times 3)=3 times ∛-1
remember that ∛-1=-1
2 times ∛-1=3 times -1=-3
now we have
5 times (-3)+18
5 times -3=-15
-15+18=3
answer is 3

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