Answer:
(infinity, -4] or [7, infinity).
Explanation:
right on edge
Answer: x = -4 or x = 7
x^2 - 3x - 28 =/>
(factor)
(x^2 + 4)(x-7) = 0
x + 4 = 0 or x - 7 = 0
(subtract -4 from 0 and 7 from 0)
x = -4 or x =7
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