Ответ:
[tex] \frac{a {}^{2} - b {}^{2} }{a {}^{2} - ab } = \frac{(a + b)(a - b)}{a(a - b)} = \frac{a + b}{a} [/tex]
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Ответ:
[tex] \frac{a {}^{2} - b {}^{2} }{a {}^{2} - ab } = \frac{(a + b)(a - b)}{a(a - b)} = \frac{a + b}{a} [/tex]