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=16/(x+2)(x-2) - 4/(x-2)
=16/(x+2)(x-2) - 4(x+2)/(x-2)(x+2)
=16/(x+2)(x-2) - 4x-8/(x+2)(x-2)
=16-4x-8/(x+2)(x-2)
=-4x+8/(x+2)(x-2)
=-4(x-2)/(x+2)(x-2)
=-4/(x+2)
=-4/(2+2)
=-4/4
=-1
Pilihan C.-1
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