LeoDBlaze LeoDBlaze
  • 15-11-2018
  • Mathematics
contestada

Simplify 3 square root of 20/ square root of 5

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Аноним Аноним
  • 15-11-2018

-7√5

rewrite 20 as 2^2·5

factor 4 out of 20. negative ∛4(5)-√5

rewrite 4 and 2^2 negative ∛2^2·5-√5

pull terms out from under the radical

-3(2√5)√5

multiply 2 by -3

-6√5-√5

subtract √5 from -6√5

-7√5

the answer is -7√5


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