Inequality
posted by Liz .
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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