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Let lambda in {-2 -1.0, 1, 2} then proba...

Let `lambda in {-2 -1.0, 1, 2}` then probability that the equation `| x^2 +3x | + lambda-lambda x= 0` possesses exactly three solutions, given that it possesses atleast 2 solution is `a/b(a and b` are co-primes`)`, then value of `a + b` is

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