РАЗЛОЖИТЬ НА МНОЖИТЕЛИ 25b^2-(5-b)^2
25b^2 = (5b)^2
(5b)^2 - (5 - b)^2 = (5b - 5 + b)(5b +5 - b) =( 6b - 5)(4b + 5)
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25b^2 = (5b)^2
(5b)^2 - (5 - b)^2 = (5b - 5 + b)(5b +5 - b) =( 6b - 5)(4b + 5)