reilleymiller reilleymiller
  • 21-05-2018
  • Mathematics
contestada

According to the Square Root property of Equations, the solution set of x2 = 25 is {±5}.

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altavistard
altavistard altavistard
  • 30-05-2018
Justify "x2 = 25 is {±5}"

First, please write x^2, not x2.

x^2 = 25; solve for x.  Take the sqrt of both sides.  Must write "plus or minus " in front of the sqrt of 25:

x^2 = 25 becomes x = plus or minus 5, so x: {-5, 5}
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