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

Toán Lớp 8: Làm tính chia : ( x3 + 4×2 – x – 4 ) : ( x + 1 ) Tìm x , biết : x ( 3x + 2 ) + ( x + 1 )2 – ( 2x – 5 )( 2x + 5 ) = – 12 nhanhhhh nha

Toán Lớp 8: Làm tính chia : ( x3 + 4×2 – x – 4 ) : ( x + 1 )
Tìm x , biết : x ( 3x + 2 ) + ( x + 1 )2 – ( 2x – 5 )( 2x + 5 ) = – 12
nhanhhhh nha

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    \begin{array}{c|c} \quad \quad \quad x^3+4x^2-x-4&x+1\\\hline x^3+x^2&x^2+3x-4\\\text{_____________________}\\\quad \quad 3x^2-x-4\\3x^2+3x\\\text{_____________________}\\-4x-4\\-4x-4\\\text{_____________________}\\0 \\\end{array}
    Vậy (x^3+4x^2-x-4):(x+1)=x^2+3x-4

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

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