<span>√(2 - 5х)</span>
По определению подкоренное вырввжение неотрицательно = >
<span> 2 - 5х ≥ 0 </span>
<span> <span>- 5х ≥ - 2 | * (- 5)</span></span>
<span><span> <span><span>х ≤ 2/5</span></span></span></span>
<span><span><span><span> <span><span><span><span>х ≤ 0,4</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>
</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>Ответ : ( - ∞ ; <span><span><span><span><span><span><span><span>0,4</span></span></span></span></span></span></span></span>]
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