Oblicz:
1. (√5 -2)(√5+2)=
2. 4:√3-1=
3.√2+3:√2+1=
4.6:√5-2=
(√5-2)(√5+2)=5-4=1 wzór skróconego mnozenia; (a+b)(a-b)=a²-b²
4:(√3-1)=4(√3+1)/[(√3-1)(√3+1)]=(4√3+4)/(3-1)=2√3+2 usunęłam niewymiernosc
(√2+3)/(√2+1)=[(√2+3)(√2-1)]/[(√2+1)(√2-1)]=
(2-√2+3√2-3)/1=2√2-1
6:(√5-2)=[6(√5+2)]/[(√5-2)(√5+2)]=(6√5-12)/(5-4)=6√5-12
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(√5-2)(√5+2)=5-4=1 wzór skróconego mnozenia; (a+b)(a-b)=a²-b²
4:(√3-1)=4(√3+1)/[(√3-1)(√3+1)]=(4√3+4)/(3-1)=2√3+2 usunęłam niewymiernosc
(√2+3)/(√2+1)=[(√2+3)(√2-1)]/[(√2+1)(√2-1)]=
(2-√2+3√2-3)/1=2√2-1
6:(√5-2)=[6(√5+2)]/[(√5-2)(√5+2)]=(6√5-12)/(5-4)=6√5-12