√128 ----- 256 Tolong Di Bantu Dong Kak

√128
_____
256

= √64 x 2
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256

= 8√2
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256

= √2
_____
32

[tex] \frac{ \sqrt{128} }{256} \\ = \frac{ \sqrt{16} \sqrt{4} \sqrt{2} }{16 \times 16} \\ = \frac{4 \times 2 \times \sqrt{2} }{16 \times 16} \\ = \frac{ \sqrt{2} }{128} [/tex]