Answer: the number is 5
Step-by-step explanation:
Let the number be [tex]x[/tex] , then the square of the number means [tex]x^{2}[/tex] .
Therefore:
[tex]x^{2} +3=28[/tex]
subtract 3 from both sides
[tex]x^{2} = 28 - 3[/tex]
[tex]x^{2} =25[/tex]
find the square root of both sides
[tex]x = 5[/tex]
