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

Toán Lớp 8: (x+1)^2+(-5x^3+10x-15x):5x=6 giúp mình vớiiiiii

Toán Lớp 8: (x+1)^2+(-5x^3+10x-15x):5x=6
giúp mình vớiiiiii

Comments ( 2 )

  1. Nhớ đanha giá 5 sao và thả 1 tym nha~cảm ơn
    (x+1)² +(-5x³+10x-15x):5x=6 (x+1)² -5x.(x²+2-3):5x=6
    (x+1)² -(x²-1)=6
    (x+1)² -(x-1)(x+1)=6
    (x+1)(x+1-x+1)=6
    (x+1).2=6
    x+1=3
    => x=2
     

  2. (x+1)² +(-5x³+10x-15x):5x=6 (x+1)² -5x.(x²+2-3):5x=6
    (x+1)² -(x²-1)=6
    (x+1)² -(x-1)(x+1)=6
    (x+1)(x+1-x+1)=6
    (x+1).2=6
    x+1=3
    => x=2
    Cho mk xin câu trả lời hay nhất ! ^-^

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