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(x+2)² > 10-x²
x²+4x+4 > 10-x²
2x²-6x+4 > 0
(2x-2) (x-2) > 0
x = 1/2 atau x = 2
Buat garis bilangan, karena > , berarti positif
__+__1/2____-____2___+____
berarti x<1/2 atau x>2 , x merupakan bilangan real