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

Toán Lớp 8: `3x^2(2x^2+2x-1)-2x(3x^2+4x-2)+5=`

Toán Lớp 8: 3x^2(2x^2+2x-1)-2x(3x^2+4x-2)+5=

Comments ( 2 )

  1. $\text{YeunhatbanT}$ 
    Giải đáp:
    3x^2(2x^2+2x-1)-2x(3x^2+4x-2)+5=6x^4 – 11x^2 + 4x +  5
    Lời giải và giải thích chi tiết:
    3x^2(2x^2+2x-1)-2x(3x^2+4x-2)+5
    =6x^4 + 6x^3 – 3x^2 – 6x^3 – 8x^2 + 4x + 5
    =6x^4 – 11x^2 + 4x +  5

  2.    $3x^{2}$($2x^{2}$ + 2x – 1) -2x($3x^{2}$ + 4x – 2) +5
    =$6x^{4}$ +$6x^{3}$- $3x^{2}$ -$6x^{3}$ – $8x^{2}$ +4x +5
    =$6x^{4}$ -$11x^{2}$+4x+5

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