Respostas

  • Usuário do Brainly
2013-05-31T22:59:39-03:00

Seja \text{x}=(-\sqrt{3}+1)\cdot(-\sqrt{3}-1)

 

Observe que:

 

(\text{a}+\text{b})\cdot(\text{a}-\text{b})=\text{a}^2-\text{b}^2

 

Desse modo, se \text{a}=-\sqrt{3} e \text{b}=1, segue que:

 

\text{x}=(-\sqrt{3})^2-1^2=3-1=2 

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