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Question

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Comments

504/882 = 2³*3²*7/2*3²*7² =2²/7=4/7 . * * *126*4/126*7 =4/7 * * *.(n-2)² =n² -2*n*2 +2² =n² -4n +4

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Спасибо!

Answer 1

504/882 = 2³*3²*7/2*3²*7² =2²/7=4/7 .или  * * *126*4/126*7 =4/7 * * *.
(n-2)² =n² -2*n*2 +2² =n² -4n +4.
остальные  видно не четко.
(7d-+3)/(4d+3) + (5d+6)/(4d+3) =(7d-+3+5d+6)/(4d+3) =(12d+9)/(4d+3) =4(4d+3)/(4d+3) =4.

Comments

спасибо

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(7d+3)/(4d+3) + (5d+6)/(4d+3) =(7d+3+5d+6)/(4d+3) =(12d+9)/(4d+3) =4(4d+3)/(4d+3) =4

Answer 2

Если не ошибаюсь,будет так
↓↓↓↓↓↓↓↓↓↓↓↓

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Comments

28/49 =4*7/7*7 =4/7. n² -4 =n² -2² =(n-2)(n+2).

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ошибайтесь

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у вас 1 правильно а втрое неправильно!

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второе ? покажите упражнение