Respuesta :

[tex]121 + b^2 = 12.1^2[/tex]
Square 12.1, and subtract 121 from both sides.
[tex]b^2 = 146.41 - 121[/tex]
Complete the subtraction on the right side. 
[tex]b^2 = 25.41[/tex]
This is the solution. 

[tex]b^2 = 25.41[/tex]
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