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x² - 4x + 4 / x - 3 ≤ 0
x² - 4x + 4 ≤ 0
(x - 2) (x - 2) ≤ 0
x - 2 ≤ 0 \/ x - 2 ≤ 0
x ≤ 2 \/ x ≤ 2
2.
9 - y² / y² + 3 ≥ 0
9 - y² ≥ 0
y² - 9 ≥ 0
(y + 9) (y - 9) ≥ 0
y + 9 ≥ 0\/ y - 9 ≥ 0
y ≥ -9 \/ y ≥ 9
3.
t / (t + 2) ≥ 3 / (t + 1)
t (t + 1) ≥ 3 (t + 2)
t² + t ≥ 3t + 6
t² + t - 3t - 6 ≥ 0
t² - 2t - 6 ≥ 0
silahkan lanjutkan :v