Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$8- \sqrt{ 2 \sqrt{ 7 \sqrt{ 9 } } } -$$

Answer

8-sqrt(2*sqrt(21))-

Solution


Since \(3\times 3=9\), the square root of \(9\) is \(3\).
\[8-\sqrt{2\sqrt{7\times 3}}-\]
Simplify  \(7\times 3\)  to  \(21\).
\[8-\sqrt{2\sqrt{21}}-\]
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