Example

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

Question

$$\sqrt{ 81 \times 49 }$$

Answer

63

Solution


Simplify  \(81\times 49\)  to  \(3969\).
\[\sqrt{3969}\]
Since \(63\times 63=3969\), the square root of \(3969\) is \(63\).
\[63\]
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