if x=5-√21 then find the value of √x/✓32-2√x -√21
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x = 5-√21
x = 5-4.58
x= 0.42
√x/√32-2√x-21 =?
Put the value of x
= √0.42/√32-2√0.42-21
= 0.64 / 5.65 -2 ×0.64 -21
= 0.11 -2×0.64-21
= 0.11 -1.28 -21
= 0.11 - 22.28
= -22.17 Answer
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