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натали577
@натали577
July 2022
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помогите пли!!!!!!!!!!!!!!
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Grafenya
1)21а"2" -(12а-5+21а"2") = 21а"2" - 12"а" + 5 - 21а"2" = 5 - 12а"2"
*21а"2" и - 21а"2" зачёркиваем
2)(х"2"+ х - 1) - (х"2" - х + 1) = х"2" + х -1 -х"2" + х - 1 = х+х-1-1= 2х-2
3)-7х"2" + х + (х+6х"2") = - 7х"2" + х + х + 6х"2" = 2х - 7х"2" + 6х"2" = 2х- х"2"
4) (12-5р"2") + (р"3" + 2р"2" - р + 15)= 12 - 5р"2"+ р"3"+ 2р"2"- р + 15=
27 - 3р"2" + р"3" - р
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Answers & Comments
*21а"2" и - 21а"2" зачёркиваем
2)(х"2"+ х - 1) - (х"2" - х + 1) = х"2" + х -1 -х"2" + х - 1 = х+х-1-1= 2х-2
3)-7х"2" + х + (х+6х"2") = - 7х"2" + х + х + 6х"2" = 2х - 7х"2" + 6х"2" = 2х- х"2"
4) (12-5р"2") + (р"3" + 2р"2" - р + 15)= 12 - 5р"2"+ р"3"+ 2р"2"- р + 15=
27 - 3р"2" + р"3" - р