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If the line l1 : 3y - 2x = 3 is the angu...

If the line `l_1 : 3y - 2x = 3` is the angular bisector of the lines `l_2 : x - y + 1=0` and `l_3 : alpha x +beta y+17=0`, then `alpha^2+beta^2-alpha-beta` is equal to ______

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2023-Question
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