Solving Radical Equations 2 with Help
View the Lesson | MATHguide homepage Updated July 7th, 2022

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Problem: Solve for the variable. Check a value if it is extraneous.
 
√ c + 15  = c + 9
 
c + 15 = ( c + )2
 
c + 15 = c2 + c +
 
0 = c2 + c +
 
0 = ( c + )( c + )
 
c1 =     c2 =
extraneous   extraneous