Example

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

Question

$$x^{2}=16$$

Answer

x=4,-4

Solution


Take the square root of both sides.
\[x=\pm \sqrt{16}\]
Since \(4\times 4=16\), the square root of \(16\) is \(4\).
\[x=\pm 4\]
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