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X^2 - 2X + 1 ≤ 4X - 7
X^2 - 6X + 8 ≤ 0
(X - 4)(X - 2)
X = 4 √ X = 2
__+__.->___-___<-.__+__
2 4
2 ≤ x ≤ 4
a) X^2 + 2X + 1 - 5X - 5 > 6
X^2 - 3X - 4 > 6
X^2 - 3X -10 > 0
(X - 5)(X + 2)
X = 5 √ X = -2
__+__<-.__-__.->__+__
-2 5
X < -2 √ X > 5