Oblicz :
(4 -2√5) · (6 + √5)
(4-2√5)*(6+√5)=24+4√5-12√5-10=14-8√5
24+4\sqrt{5} - 12\sqrt{5} - 10= 14 - 8\sqrt{5}
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(4-2√5)*(6+√5)=24+4√5-12√5-10=14-8√5
24+4\sqrt{5} - 12\sqrt{5} - 10= 14 - 8\sqrt{5}