(√2-√18)²=(3√2):√2-1= √2-1 jest w mianowniku2∛½=.... Question from @misia126

misia126 @misia126

September 2018 2 28 Report

(√2-√18)²=

(3√2):√2-1= √2-1 jest w mianowniku

2∛½=

ola987

(√2-√18)²=(√2)²- 2 √2 √18 +(√18)²= 2 - 2√36+18=2-12+18=8

(3√2):(√2-1)= mnoze licznik i mianownik przez (√2+1)= 3√2(√2+1)/(√2-1)(√2+1)=

= (6+3√2)/1= 6+3√2

2∛½= dwojke wciagam do pierwiastka= ∛8 razy ∛1/2= ∛8/2= 2/∛2= =2(∛2)²/2=(∛2)²

1 votes Thanks 0

niema5

(√2-√18)²=√2²-2*√2*√18+√18²=2-2√36+18=20-2*6=20-12=8

$\frac{{3\sqrt{2}}}{{\sqrt2}-1}}=\frac{{(3\sqr{2})*(\sqrt2+1)}}{{(\sqrt2}-1)(\sqrt2+1))}}=\frac{3*2+3\sqrt{2}}{2-1}=\frac{6+3\sqrt{2}}{1}={6}+3\sqrt{2}}$

$2\sqrt[3]{\frac{1}{2}}=2*(\frac{1}{2})^{\frac{1}{3}}=2*2^{-\frac{1}{3}}=2^{\frac{2}{3}}$

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