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x²-3x-18≥0
(x-6) (x+3)≥0
(x-3) (x+3/2)≥0
9-x²≥0
-x+9≥0
x²-9≤0
(x+3) (x-3)
2x²-3x-9<9-x²
3x²-3x-18<0
x²-3x-54<0
(x-9) (x+6)<0
(x-3 (x+2)<0
lihat menggunakan gambar yng mana paling banyak kene arsir
hp= -2<x≤-3/2