anagoris
anagoris anagoris
  • 24-10-2016
  • Mathematics
contestada

is ( square root 12 -4)(4+square root 12) rational or irrational

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apologiabiology
apologiabiology apologiabiology
  • 24-10-2016
remember
(a-b)(a+b)=a²-b²

we can rewrite what we were given into
[tex]( \sqrt{12}-4)( \sqrt{12}+4)=( \sqrt{12})^2-(4)^2=12-16=-4 [/tex]
definitely rational
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