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The straight line L-=X+Y+1=0 and L1-=X+...

The straight line `L-=X+Y+1=0 and L_1-=X+2Y+3=0 " are intersectiong, m is the slope of the straight line " L_2 " such that L is the bisector of the angle between " L_1 and L_2 " The value of " m^2` is .

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