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riki3343433
@riki3343433
July 2022
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Упростите выражения
1) (а-2)^2-(a-1)(a+3);
2) (b+4)(b-2)-(b-1)^2
Очень срочно
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Magnitogorskru
Verified answer
1) (а-2)^2-(a-1)(a+3)=
a^2-4-(a^2+3a-a-3)=
a^2-4-a^2-3a+a+3=
-2a-1
2) (b+4)(b-2)-(b-1)^2=
b^2-2b+4b-4b-b^2+1=1-2b
3 votes
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Answers & Comments
Verified answer
1) (а-2)^2-(a-1)(a+3)=a^2-4-(a^2+3a-a-3)=
a^2-4-a^2-3a+a+3=
-2a-1
2) (b+4)(b-2)-(b-1)^2=
b^2-2b+4b-4b-b^2+1=1-2b