49 has two possibles values which are 7 and -7 because the product of two negative signs will result in a positive sign.
Perfect squares are also known as squares of any integers. For example, 7² is a perfect square which means that we can find the square of the resulting values.
The square root of any perfect integer will always return two values because the product of two negative values will also result in positive values. For example, the square root of 49 will result in two values as shown:
[tex]\sqrt{49}\\= \pm\sqrt{49}\\=\pm7[/tex]
The two values are 7 and -7.
-7 is part of the square root of 49 since (-7)² also results in 49
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