Odpowiedź:
a) (√6+2) (√6-2) = √6² + (√6-2) + 2√6 -4
6+ √6•(-2) + 2√6 -4 = 2 + 2√6 + (√6•(-2))
b)(√7-√2)(√2+2√7) = (√7•√2) + 2√7 + 7 -2 - ( -√2 + 2√7) = √7 + 2√7 + 7 - 2 = 3√7 + 5
c)4√8 - 12 - 4 + 3√2 = (-16) + 4√8 + 3√2
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Odpowiedź:
a) (√6+2) (√6-2) = √6² + (√6-2) + 2√6 -4
6+ √6•(-2) + 2√6 -4 = 2 + 2√6 + (√6•(-2))
b)(√7-√2)(√2+2√7) = (√7•√2) + 2√7 + 7 -2 - ( -√2 + 2√7) = √7 + 2√7 + 7 - 2 = 3√7 + 5
c)4√8 - 12 - 4 + 3√2 = (-16) + 4√8 + 3√2