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Status: Waiting for your answers.

Problem: Solve for the variable. Check a value if it is extraneous.   √ r + 20  = r + 8   r + 20 = ( r + )2   r + 20 = r2 + r +   0 = r2 + r +   0 = ( r + )( r + )   r1 =     r2 = extraneous   extraneous