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Status: Waiting for your answers.

Problem: Solve for the variable. Check a value if it is extraneous.   √ n + 23  = n + 3   n + 23 = ( n + )2   n + 23 = n2 + n +   0 = n2 + n +   0 = ( n + )( n + )   n1 =     n2 = extraneous   extraneous