Set a = {(x, y) y = x & # 178; + MX + 2}, set B = {(x, y) X-Y + 1 = 0,0 ≤ x ≤ 2}, if a ∩ B ≠ & # 8709;, find the value range of real number K

The equations y = x ^ 2 + MX + 2, X-Y + 1 = 0 at 0 = 3

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