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elvir2014
@elvir2014
July 2022
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(у-9)^2-3у(у+1)
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Snovvflake
(y-9)^2-3y(y+1)=y^2-18y+81-3y^2-3y=-2y^2-21y+81
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elvir2014
у тебя правильно
elvir2014
**????????????????????????????
Snovvflake
Хочешь проверь
elvir2014
как
Snovvflake
На моем примере реши это сам
nurk
(y-9)^2-3y(y+1)=y^2-18y+81-3y^2-3y=-2y^2-21y+81
а=-2 в=-21 с=81
Д=441+648=1089
у1=21-33\-4=12\4=3
у2=21+33\-4=54\-4=27\-2(-13целых 1\2)
BeeLarka
(у-9)^2-3у(у+1);
у^2-9^2-3у^2+3у;
== ---- ----- ~~
-2у^2+3у -9^2;
-2у^2+3у
+81
=0
0 votes
Thanks 1
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Answers & Comments
а=-2 в=-21 с=81
Д=441+648=1089
у1=21-33\-4=12\4=3
у2=21+33\-4=54\-4=27\-2(-13целых 1\2)
у^2-9^2-3у^2+3у;
== ---- ----- ~~
-2у^2+3у -9^2;
-2у^2+3у +81=0