1.Zapisz w najprostszej postaci wyrażenia:
a) (2√7 + 4√5)(√5 + 3√7)
b) (√11 - 2√2)(3√11 - 4√2)
c) (2√5 - √2)(4√2 + 3√5)
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a) (2√7 + 4√5)(√5 + 3√7) = 2√35 + 42 + 20 + 12√35 = 62 + 14√35
b) (√11 - 2√2)(3√11 - 4√2) = 33 - 4√22 - 6√22 + 16 = 49 - 10√22
c) (2√5 - √2)(4√2 + 3√5) = 8√10 + 30 - 8 - 3√10 = 22 + 5√10