Question

Найдите значение дроби:​

Answer 1

Ответ:

$frac{(38 - 17)(38 + 17)}{(72 - 16)(72 + 16)} = frac{21 times 55}{56 times 88 } = frac{3 times 5}{8 times 8} = frac{15}{64} = 0.234375$

$frac{(39.5 - 3.5)(39.5 + 3.5)}{(57.5 - 14.5)(57.5 + 14.5)} = frac{36 times 43}{43 times 72} = frac{36}{72} = frac{1}{2} = 0.5$

$frac{(17.5 - 9.5)(17.5 + 9.5)}{(131.5 - 3.5)(131.5 + 3.5)} = frac{8 times 27}{128 times 135} = frac{1 times 1}{16 times 5} = frac{1}{80} = 0.0125$