Question

ВЫЧИСЛИТЕ
Помагите даю 50 баллов

Answer 1

$sqrt{ frac{ 34^{2}- 9^{2} }{387} } = sqrt{ frac{(34-9)(34+9)}{387} } = sqrt{ frac{25*43}{387} }= sqrt{ frac{25}{9} }= frac{5}{3}=1 frac{2}{3} \\ sqrt{ frac{464}{ 39^{2}-10 ^{2} } } = sqrt{ frac{464}{(39-10)(39+10)} } = sqrt{ frac{464}{29*49} }= sqrt{ frac{16}{49} }= frac{4}{7}\\ sqrt{ frac{ 69^{2} - 12^{2} }{ 89^{2}- 32^{2} } }= sqrt{ frac{(69-12)(69+12)}{(89-32)(89+32)} } = sqrt{ frac{57*81}{57*121} } = sqrt{ frac{81}{121} } = frac{9}{11}$

$sqrt{ frac{ 128^{2}- 41^{2} }{ 156^{2}- 69^{2} } }= sqrt{ frac{(128-41)(128+41)}{(156-69)(156+69)} }= sqrt{ frac{87*169}{87*225} } = sqrt{ frac{169}{225} }= frac{13}{15}$

Answer 2

Спосибо большое