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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: (x+2y-z)^2-2(x+2y-z)(2y-z)+(2y-z)^2

Toán Lớp 8: (x+2y-z)^2-2(x+2y-z)(2y-z)+(2y-z)^2

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    (x+2y-z)^2-2(x+2y-z)(2y-z)+(2y-z)^2
    =[(x+2y-z)-(2y-z)]^2
    =(x+2y-z-2y+z)^2
    =x^2
    CHÚC BẠN HOK TỐT!!!

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222-9+11+12:2*14+14 = ? ( )