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(2x-2)^2 < 1/4 (3x-5)^2
4 (2x -2)^2 < (3x-5)^2
4( 4x^2 - 8x + 4) < 9x^2 - 30x + 25
16x^2 -32 x + 16 < 9x^2 - 30x + 25
7x^2 - 2x - 9 < 0
(7x -9)(x+1) < 0
x > 9/7 atau x < - 1
B..|2x-2| ≥ 1/2 (3x-5)
(2x-2)^2 ≥ 1/4 (3x-5)^2
4 (2x -2)^2 ≥(3x-5)^2
4( 4x^2 - 8x + 4) ≥ 9x^2 - 30x + 25
16x^2 -32 x + 16 ≥ 9x^2 - 30x + 25
7x^2 - 2x - 9 ≥ 0
(7x -9)(x+1) ≥0
x ≥9/7 atau x ≤ - 1