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Автор - typeni

разложите на множители.​

Ответ

Проверено экспертом

Автор - Evgenia4836

можно еще дополнить:

4б) (10a-5b)(10a+5b)= 5*5(2a-b)(2a+b)= 25(2a-b)(2a+b)

4в) (12y-4k)(12y+4k)= 4*4(3y-k)(3y+k)= 16(3y-k)(3y+k)

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