√ ( 10 - X ) + √ ( X - 5) = √ 5
( √ 10 - X) + √ ( X - 5) ) ^ 2 = ( √ 5)^2
( √ 10 - X)^2 + 2 * [ ( √ 10 - X) * ( √ X - 5 ) ] + ( √ X - 5)^2 = 5
10 - X + X - 5 + 2 * √ ( 10 - X)*( X - 5) - 5 = 0
2 √ ( 10 - X) * ( X - 5 ) = 0
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10 - X = 0
X = 10
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X - 5 = 0
X = 5
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Ответ 10 и 5