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please check my answers. thanxs!

Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation.

x^2 - 6x + 5 > 0
-I got (-ininity,1) u (5, infinity)

x^2 - 3x - 18 < 0
-I got (-infinity,-3) u (6, infinity)

x^2 - 3x - 28 ¡Ü 0
-I got (-ininity,-4] u [7,infinity)

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