21 задание из огэ математика
[tex] \frac{x-4}{ \sqrt{x} -2} -2[/tex]
при х=2,25
[tex] \frac{x-4}{ \sqrt{x} -2} -2[/tex]
при х=2,25
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(x - 4)(√x + 2) / (√x - 2)(√x + 2) - 2 == (x - 4)(√x + 2)/ (x + 4) - 2 =
= √x + 2 - 2 = √x
√2,25 = 1,5
Ответ
1,5
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