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= (5(x-2) + 5(x+2)) / (x+2)(x-2)
= (5x - 10 + 5x + 10) / (x^2 - 2^2)
= 10x / (x^2 - 4)
= 10 per x2 + 2x - 2x - 4
= 10 per x2 (kuadrat) - 4