usuń niewymierność z mianownika 3√7/2√3
3√7 √3 3√21
---- * ----- = ------ = 1/2*√21
2√3 √3 2*3
3√7/2√3 * √3/√3 =(3√7*√3)/2*(√3)² =3√21/(2*3)=3√21/6 =√21/2
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3√7 √3 3√21
---- * ----- = ------ = 1/2*√21
2√3 √3 2*3
3√7/2√3 * √3/√3 =(3√7*√3)/2*(√3)² =3√21/(2*3)=3√21/6 =√21/2