Wykonaj działania
a) ( 3 - √7 ) ( 2 + 2√7 )
b) ( √3 + 2√2 ) ( 4√3 - √2 )
c) ( √6 - 2√3 ) ( 2√6 + 6√3 )
d) ( 5√2 - 2√10 ) ( -3√10 - 2√2)
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a) ( 3 - √7 ) ( 2 + 2√7 ) = 6 - 6√7 - 2√7 - 14 = -8 -8√7
b) ( √3 + 2√2 ) ( 4√3 - √2 )= 12 - √6 + 8√6 - 4 =8 +7√6
c) ( √6 - 2√3 ) ( 2√6 + 6√3 ) =12 + 6 √18 - 4 √18 - 36 = -24 + 2 √18 = -24 +6 √2
d) ( 5√2 - 2√10 ) ( -3√10 - 2√2) = -15√20 - 20 + 60 +4√20 = 40 - 11√20 = 40 - 22√5
a) ( 3 - √7 ) ( 2 + 2√7 ) = 6 - 6√7 - 2√7 - 14 = - 8 - 8√7
b) ( √3 + 2√2 ) ( 4√3 - √2 )= 12 - √6 + 8√6 - 4 = 8 + 7√6
c) ( √6 - 2√3 ) ( 2√6 + 6√3 ) =12 + 6 √18 - 4 √18 - 36 = - 24 + 2 √18 = - 24 + 6 √2
d) ( 5√2 - 2√10 ) ( - 3√10 - 2√2) = -15√20 - 20 + 60 + 4√20 = 40 - 11√20 = 40 - 22√5