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loli868
@loli868
November 2021
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Помогите, очень срочно!!! Дам 40 баллов!!!
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SlipKnot17
1)4a^2+1-4a-4a^2=1-4a
2)4a^2-8a-a^2-4+4a+4=3a^2-4a
3)a^2+2a+4a+8-a^2-1-2a=4a+7
4)a^2+1-2a=a^2-a-2a-2=-5a-1
2 votes
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selmash21
(2а-1)^2-4а^2=4а^2-4а+1-4а^2=1-4а
4а(а-2)-(а-2)^2+4=4а^2-8а-а^2+4а-4+4=3а^2-4а
(а+2)(а+4)-(а+1)^2=а^2+4а+2а+8-а^2-2а-1=4а+7
(а-1)^2-(а+1)(а+2)=а^2-2а+1-а^2-2а-а-2=-5а-1
0 votes
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Answers & Comments
2)4a^2-8a-a^2-4+4a+4=3a^2-4a
3)a^2+2a+4a+8-a^2-1-2a=4a+7
4)a^2+1-2a=a^2-a-2a-2=-5a-1
4а(а-2)-(а-2)^2+4=4а^2-8а-а^2+4а-4+4=3а^2-4а
(а+2)(а+4)-(а+1)^2=а^2+4а+2а+8-а^2-2а-1=4а+7
(а-1)^2-(а+1)(а+2)=а^2-2а+1-а^2-2а-а-2=-5а-1