ОДЗ x²-x-2≥0
x1+x2=1 U x1*x2=-2
x1=-1 U x2=2
+ _ +
--------[-1]------------[2]---------
x≤-1 U x≥2
√(x²-x-2)≥0⇒(x-4)/(x-5)≤0
x=4 x=5
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+ _ +
----[-1]----[4]----------[2]----(5)-----------
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x∈[2;5)