PerTIDAKsamaan
(2x - 5)/(x + 3) - (x - 4)/(x + 1) ≥ 0
((2x - 5)(x + 1) - (x - 4)(x + 3))/(x + 3)(x + 1) ≥ 0
(2x² - 3x - 5 - x² + x + 12) / (x + 3)(x + 1) ≥ 0
(x² - 2x + 7)/(x + 3)(x + 1) ≥ 0
Pembuat nol :
x² - 2x + 7 = 0
tdk memotong sb x → D < 0
(x + 3)(x + 1) = 0
x = -1 atau x = -3
Uji titik
++..(-3)..- -..(-1)..++
Nilai x yg memenuhi x < -3 atau x > -1
y = -2x + 10
x = -3 → y > 16
x = -1 → y < 12
Opsi: C
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PerTIDAKsamaan
(2x - 5)/(x + 3) - (x - 4)/(x + 1) ≥ 0
((2x - 5)(x + 1) - (x - 4)(x + 3))/(x + 3)(x + 1) ≥ 0
(2x² - 3x - 5 - x² + x + 12) / (x + 3)(x + 1) ≥ 0
(x² - 2x + 7)/(x + 3)(x + 1) ≥ 0
Pembuat nol :
x² - 2x + 7 = 0
tdk memotong sb x → D < 0
(x + 3)(x + 1) = 0
x = -1 atau x = -3
Uji titik
++..(-3)..- -..(-1)..++
Nilai x yg memenuhi x < -3 atau x > -1
y = -2x + 10
x = -3 → y > 16
x = -1 → y < 12
Opsi: C