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dikuadratkan
16x²-32x+16 ≥ 16x²+24x+9
56x≤7
x≤7/56
x≤1/8
jadi jawabannya c
(4(x-1))² ≥ (4x+3)²
(4x-4)² - (4x+3)² ≥ 0 --> ingat a²-b² = (a+b)(a-b)
(4x-4+4x+3).(4x-4-4x-3) ≥ 0
(8x-1)(-7) ≥ 0
-56x+7 ≥ 0
-56x ≥ -7 --> ingat pertidaksamaan jk dikali atau dibagi dgn bil - tanda berubah mjd kebalikannya
x ≤ 7/56
x ≤ 1/8
semoga membantu ya ^_^