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Полинка130274
@Полинка130274
August 2022
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Решите 16,сократить дроби под в и г,пожалуйста,срочно нужно!!!!!ПРооошуууу
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oganesbagoyan
Verified answer
Task/25095230
-------------------
Сократите дроби
16 в)
(a
³ -8a²+20a-16) / (a³ -6a²+12a-8)
=( (a³ -4a²) -(4a² -16a) +(4a -16) ) / (a-2)³
(a² (a -4) -4a(a -4) +4(a -4) ) / (a-2)³ = (a -4)(a² -4a +4) / (a-2)³
=
(a -4)(a -2)² / (a-2)³
= (a-4) /(a-2)
.
-------
16 г)
(1-3a +3a
² -a³) / (a³ -4a²+5a-2)
=
-(a³ -3a²+3a-1) / ( (a³ -2a²) -(2a² - 4a) +(a -2) ) =
-(a-1)³/ ( (a²
(a -2) -2a(a - 2) +(a -2) ) =
-(a-1)³/ (a -2)(a² -2a +1 ) =-(a -1)³
/
(a -2)(a
-1)
²
= -(a-1)/(a-2) .
* * * иначе (1-a)/ (a-2) * * *
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Answers & Comments
Verified answer
Task/25095230-------------------
Сократите дроби
16 в)
(a³ -8a²+20a-16) / (a³ -6a²+12a-8) =( (a³ -4a²) -(4a² -16a) +(4a -16) ) / (a-2)³
(a² (a -4) -4a(a -4) +4(a -4) ) / (a-2)³ = (a -4)(a² -4a +4) / (a-2)³ =
(a -4)(a -2)² / (a-2)³ = (a-4) /(a-2) .
-------
16 г)
(1-3a +3a² -a³) / (a³ -4a²+5a-2) =
-(a³ -3a²+3a-1) / ( (a³ -2a²) -(2a² - 4a) +(a -2) ) =
-(a-1)³/ ( (a²(a -2) -2a(a - 2) +(a -2) ) =
-(a-1)³/ (a -2)(a² -2a +1 ) =-(a -1)³ / (a -2)(a -1)² = -(a-1)/(a-2) .
* * * иначе (1-a)/ (a-2) * * *