Ответ:
а) 1/4х²-1/9у² = 1/36(9х²-4у²) = 1/36(3х-2у)(3х+2у)
б) -4а²b²+25 = 25-4а²b² = (5-2ab)(5+2ab)
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Ответ:
а) 1/4х²-1/9у² = 1/36(9х²-4у²) = 1/36(3х-2у)(3х+2у)
б) -4а²b²+25 = 25-4а²b² = (5-2ab)(5+2ab)