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(2x-5)^2<(x+4)^2
(4x^2-20x+25)<(x^2+8x+16)
3x^2-12x+9<0
dibagi 3 semua
x^2-4x+3<0
(x-1)(x-3)<0
buat garis bilangan dahulu sehingga didapat
x<1 atau x>3