Toán Lớp 8: Tính : (2x-y+z) ^2 giúp mik vs ạ

Question

Toán Lớp 8:  Tính : (2x-y+z) ^2 giúp mik vs ạ

ngochuong2k2 · Answer

Giải đáp:       Lời giải và giải thích chi tiết:   (2????&minus;????+????)&sup2;   &hArr;(2????&minus;????+????)(2????&minus;????+????)   &hArr;2????(2????&minus;????+????)+(2????&minus;????+????)(&minus;????)+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????+(2????&minus;????+????)(&minus;????)+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;(2????&minus;????+????)&sdot;????+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;(2????????+????(&minus;????)+????????)+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;(2????????&minus;????????+????????)+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;(2????????&minus;????&sup2;+????????)+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;2????????+????&sup2;&minus;????&sdot;????+????(2????&minus;????+????)   &hArr;4????&sup2;&minus;2????????+2????????&minus;2????????+????&sup2;&minus;????&sdot;????+2????????&minus;????????+????&sup2;   &hArr;4????&sup2;&minus;2????????+2????????&minus;2????????+????&sup2;&minus;????&sdot;????+2????????+????&sup2;&minus;????&sdot;????   &hArr;4????&sup2;&minus;4????????+2????????+????&sup2;&minus;????&sdot;????+2????????+????&sup2;&minus;????&sdot;????   &hArr;4????&sup2;&minus;4????????+4????????+????&sup2;&minus;????&sdot;????+????&sup2;&minus;????&sdot;????   &hArr;4????&sup2;&minus;4????????+4????????+????&sup2;+????&sup2;&minus;????&sdot;????&minus;????&sdot;????    ( M&igrave;nh ko l&agrave;m tắt nếu bạn l&agrave;m tắt đc bước n&agrave;o th&igrave; l&agrave;m nh&eacute;)

diemmyhoa · Answer

$(2x-y+z)^{2}$    => ( 2x - y + z) ( 2x - y + z )