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a)
1 (√2 + 3) = √2 + 3 = √2 + 3 = 3 + √2 = - 3 - √2
(√2 - 3) (√2 + 3) 2 + 3√2 - 3√2 - 9 2 - 9 - 7 7
*********************************************************************************
b)
3 . (√3 - √2) = 3(√3 - √2) = 3√3 - 3√2 = 3(√3 - √2)
(√3 + √2) (√3 - √2) 3 - √6 + √6 - 2 1
= 3√3 - 3√2
***********************************************************************************
c)
6 . (3 +√2) = 18 + 6√2 = 18 + 6√2
(3 - √2) (3 + √2) 9 + 3√2 - 3√2 - 2 7
*********************************************************************
d)
2 (√2 - √6) = 2(√2 - √6) = 2 (√2 - √6) = - (√2 - √6)
(√2 + √6) (√2 - √6) 2 - √2.√6 + √2.√6 - 6 - 4 2
1 (√2 + 3) = √2 + 3 = √2 + 3 = 3 + √2 = - 3 - √2
(√2 - 3) (√2 + 3) 2 + 3√2 - 3√2 - 9 2 - 9 - 7 7
*********************************************************************************
b)
3 . (√3 - √2) = 3(√3 - √2) = 3√3 - 3√2 = 3(√3 - √2)
(√3 + √2) (√3 - √2) 3 - √6 + √6 - 2 1
= 3√3 - 3√2
***********************************************************************************
c)
6 . (3 +√2) = 18 + 6√2 = 18 + 6√2
(3 - √2) (3 + √2) 9 + 3√2 - 3√2 - 2 7
*********************************************************************
d)
2 (√2 - √6) = 2(√2 - √6) = 2 (√2 - √6) = - (√2 - √6)
(√2 + √6) (√2 - √6) 2 - √2.√6 + √2.√6 - 6 - 4 2
JessicaRossato:
essas respostas estão certas
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