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72. Let a, b, c e R and a + O be such th...

72. Let a, b, c e R and a + O be such thatU uvanced)-2018(a + 4)2 < 4b, then the quadratic equationax + bx + c = 0, has(1) No real root(2) Exactly one real root living in (3) Exactly two real roots lying in ()(4) One root is less than and the other rocis greater than 5

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