catherinezeffer catherinezeffer

24-11-2018
Mathematics

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find a negative real number such that the square of the sum of the number and 20 is equal to 36.

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alessandroarenas alessandroarenas

24-11-2018

In general you want a number x such that

[tex](x+20)^2 = 36\\[/tex]

Resolving this you obtain two solutions.

[tex](x+20)^2 = 36\\x + 20 = \pm 6\\x = \pm 6 - 20\\x_1 = -14, x_2 = -26.[/tex]

So...

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