<span>√(54/125</span><span><span>) = <span>√(6*9/5*25</span><span><span>) = </span></span><span>3/5 √(6/5</span><span><span>) </span></span>
</span></span>
<span>√(248/128</span><span><span>) = <span>√(124/64</span><span><span>) = </span></span><span><span><span>√(31/16</span><span><span>) = </span></span></span></span>1/4 <span><span><span>√(31</span><span><span>) </span></span></span></span>
</span></span>
<span>√(13/32</span><span><span>) = <span>√(13/2*16</span><span><span>) = </span></span><span>1/4 √(13/2</span><span><span>)</span></span>
</span></span>
<span>√(17/81</span><span><span>) = 1/9 <span>√(17</span><span><span>) </span></span>
</span></span>
Решение на фотографии! !!!!!!!!!!!!!!
Пусть скорость автобуса х, тогда 2,5*х=2*(10+х)
<span>решаем </span>
<span>2,5х=20+2х </span>
<span>2,5х-2х=20 </span>
<span>0,5х=20 </span>
<span>х=20/0,5 </span>
<span>х=40км. </span>
Ответ:
=(√6+√2)²/4
ттттттттттттттттттттт
Объяснение:
домножим и числ, и знаменатель на (√6+√2)