Question

Aduceti la forma ce mai simpla expresia 8 radical din 48-8radical din80+5radicaldin 405-7radical din 147

Answer 1

$8 \sqrt{48}-8 \sqrt{80} +5 \sqrt{405}-7 \sqrt{147} = \\ \\ 8\sqrt{2*3*2^{3}} -8 \sqrt{2*5*2^{3}}+5 \sqrt{5*3^{4}}-7 \sqrt{3*7^{2} } = \\ \\ =32\sqrt{3}-32 \sqrt{5} +45 \sqrt{5}-49 \sqrt{3}$