calcul radical

Aw0keNN · Posted: 31-08-2013, 12:01:34 | Translate post to: ... (Click for more languages)

am uitat totul in vacanta

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media geometrica a numerelor 4√2+5 si 4√2-5 .......

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katy_naritza · Posted: 08-09-2013, 15:28:16 | Translate post to: ... (Click for more languages)

Media geometrica a 2 numere a si b este sqrt(a*b), adica radical din a*b.
Pentru (4√2+5)*(4√2-5) folosesti formula (a+b)*(a-b)=a^2-b^2...deci devine (4√2)^2-5^2 adica 16*2-25 adica 7, si mg este √7

Fixed!

MiniGun · Posted: 15-09-2013, 09:01:52 | Translate post to: ... (Click for more languages)

radical din 7 e