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The key to solving this type of problem is to solve a different equation in every important interval. As a hint, I will tell you that the important intervals are -inf to -3, -3 to 0, 0 to 1, 1 to inf.

BTW, have you tried C = -1?
_________________

Best,

AkamaiBrah Former Senior Instructor, Manhattan GMAT and VeritasPrep Vice President, Midtown NYC Investment Bank, Structured Finance IT MFE, Haas School of Business, UC Berkeley, Class of 2005 MBA, Anderson School of Management, UCLA, Class of 1993

The key to solving this type of problem is to try and solve a different equation (without any absvalue signs) in every important interval. As a hint, I will tell you that the important intervals are -inf to -3, -3 to 0, 0 to 1, 1 to inf. . (Note that in each interval, the sign of the expression in each absvalue sign will not change).

BTW, have you tried C = -1?

BTW again, there is no reason for the pair of absvalue signs surrounding the LHS of the equation because the addition of two absolute values will always be non-negative.
_________________

Best,

AkamaiBrah Former Senior Instructor, Manhattan GMAT and VeritasPrep Vice President, Midtown NYC Investment Bank, Structured Finance IT MFE, Haas School of Business, UC Berkeley, Class of 2005 MBA, Anderson School of Management, UCLA, Class of 1993

The key to solving this type of problem is to try and solve a different equation (without any absvalue signs) in every important interval. As a hint, I will tell you that the important intervals are -inf to -3, -3 to 0, 0 to 1, 1 to inf. . (Note that in each interval, the sign of the expression in each absvalue sign will not change).

BTW, have you tried C = -1?

BTW again, there is no reason for the pair of absvalue signs surrounding the LHS of the equation because the addition of two absolute values will always be non-negative.

sure Akam we know this method, but are too lazy to do all the stuff.