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

Toán Lớp 8: 1) 5x mũ 2 = 10xy + 5y mũ 2 2) 6x mũ 2 + 12xy + 6y mũ 2 3) 2x mũ 3 + 4x mũ2 y + 2x ymũ 2 4) -3x mux4 y – 6x mux3 ymux2 – 3x mux2 ymu

Tháng Bảy 15, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: 1) 5x mũ 2 = 10xy + 5y mũ 2
2) 6x mũ 2 + 12xy + 6y mũ 2
3) 2x mũ 3 + 4x mũ2 y + 2x ymũ 2
4) -3x mux4 y – 6x mux3 ymux2 – 3x mux2 ymux3
5) 4x mũ 5 y mũ 2 + 8x mũ 4 y mũ 3 + 4x mĩ 3 y mũ 4
6) -3x mũ 2 – 12x -12
7) 2x mux3 + 8x mux2 + 8x
8) -3x mux4 y – 12x mũ 2 y – 12x mũ 2 y
9) 4x mũ 5 y mũ 2 + 16x mũ 4 y mũ 2 + 16x mũ 3 y mũ 2
10) 5x mũ 4 y mũ 2 + 20x mũ 3 y mũ 2 + 20x mũ 2 y mũ 2

Comments ( 1 )

  1. hongocha12
    hongocha12
    15 Tháng Bảy, 2022 at 6:05 sáng
    Reply
     1) 5x^2 + 10xy + 5y^2
    = 5(x^2 + 2xy + y^2 )
    = 5(x+y)^2
     2) 6x^2 + 12xy + 6y^2
    = 6(x^2+2xy+ y^2 )
    = 6(x+y)^2
     3) 2x^3 + 4x^2 y + 2xy^2
    = 2x(x^2 + 2xy + y^2)
    = 2x(x+y)^2
    4) -3x^3 y – 6x^3 y^2 – 3x^2 y^3
    = -3x^2y(x + 2xy + y)
    5) 4x^5 y^2 + 8x^4 y^3 + 4x^3 y^4
    = 4x^3 y^2( x^2 + 2xy + y^2 )
    = 4x^3 y^2(x+y)^2
    6) -3x^2 – 12x – 12
    = -3(x^2+4x+4)
    = -3(x+2)^2
    7) 2x^3 + 8x^2 + 8x
    = 2x(x^2 + 4x + 4)
    = 2x(x+2)^2
    8) 3x^3 – 12x^2 y – 12xy^2
    = -3x(x^2 + 4xy + 4y^2)
    = -3x(x+2y)^2
    9) 4x^5 y^2 + 16x^4 y^2 + 16x^3 y^2
    = 4x^3y^2( x^2 + 4x + 4)
    = 4x^3 y^2( x+2)^2
    10) 5x^4 y^2 + 20x^3 y^2 + 20x^2 y^2
    = 5x^2 y^2( x^2 + 4x + 4 )
    = 5x^2 y^2 (x+2)^2
     

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

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