JEE Main 2020 (Online) 7th January Evening Slot | Matrices and Determinants Question 223 | Mathematics

If the system of linear equations,
x + y + z = 6
x + 2y + 3z = 10
3x + 2y + $$\lambda $$z = $$\mu $$
has more than two solutions, then $$\mu $$ - $$\lambda $$² is equal to ______.

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