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Verified answer
A. (√x-2)^2 < 3^2= x - 4 < 9
x < 9 + 4
x < 13
B. (√2x+1)^2 ≥ (x-1)^2
= 2x + 1 ≥ (x - 1) (x - 1)
= 2x + 1 ≥ x^2 - 2x + 1
-2 ≥ x^2 - 4x