Odpowiedzi

2009-09-27T10:51:25+02:00
2(2√3 -√5)= 4√3-2√5
-√3(1+2√3)=-√3-6
(√5+1)²=ze wzor skroconego mnozenia 5+2√5+1
(5√2-1)²(2√2+1)= (50 -10√2+1)(2√2+1)= 100√2+50-40-10√2+2√2+1=11+92√2
2009-09-27T11:05:33+02:00
2(2√3 -√5)= 4√3-2√5
-√3(1+2√3) = -√3-3=-(3+√3)
(√5+1)² = 5+2√5+1=2(√5+3)
(5√2-1)²(2√2+1)= (50-10√2+1)(2√2+1)=102√2+51-40-10√2=92√2+11