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Status: Waiting for your answers.

Problem: Solve for the variable. Check a value if it is extraneous.   √ w - 1  = w - 7   w - 1 = ( w + )2   w - 1 = w2 + w +   0 = w2 + w +   0 = ( w + )( w + )   w1 =     w2 = extraneous   extraneous