*a²-b2 = Ca-b)a the exam. - (x-5) x²-(5)2 o (x-5)(x5) ニ -X-5) (x-5)(X+5) 5 - x A. lim x-5 x2 – 25 lim X->5 (X+5) こ X²+5X-5X+25 75+5) 10

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