Question

найдите значения выражения 5a/25a²-15ab - 3b/25a²-9b²

Answer 1

$frac{5a}{5a(5a-3b)} - frac{3b}{(5a-3b)(5a+3b)} = frac{5a+3b-3b}{(5a-3b)(5a+3b)} = frac{1}{25a^2-9b^2}$

Answer 2

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