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

Toán Lớp 8: ( x + 2 ) . ( x ^2 – 2x + 4 ) + ( x – 2 ) ^3 – 6 ( x + 1) . ( x + 1 ) -3x . ( x + 2 )^2 + ( x + 3 ) . ( x – 1 ) . ( x + 1 ) – ( 2x – 3)

Home/ Toán Lớp 8: ( x + 2 ) . ( x ^2 – 2x + 4 ) + ( x – 2 ) ^3 – 6 ( x + 1) . ( x + 1 ) -3x . ( x + 2 )^2 + ( x + 3 ) . ( x – 1 ) . ( x + 1 ) – ( 2x – 3)

Toán Lớp 8: ( x + 2 ) . ( x ^2 – 2x + 4 ) + ( x – 2 ) ^3 – 6 ( x + 1) . ( x + 1 ) -3x . ( x + 2 )^2 + ( x + 3 ) . ( x – 1 ) . ( x + 1 ) – ( 2x – 3)

Tháng Bảy 29, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: ( x + 2 ) . ( x ^2 – 2x + 4 ) + ( x – 2 ) ^3 – 6 ( x + 1) . ( x + 1 )
-3x . ( x + 2 )^2 + ( x + 3 ) . ( x – 1 ) . ( x + 1 ) – ( 2x – 3)^2

Comments ( 1 )

  1. phuongthuydung
    phuongthuydung
    29 Tháng Bảy, 2022 at 4:12 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
     (x+2)(x²-2x+4)+(x-2)³-6(x+1)(x+1)-3x(x+2)²+(x+3)(x-1)(x+1)-(2x-3)²
    = (x³+2³)+(x³-6x²+12x-8)-6(x+1)²-3x(x²+4x+4)+(x+3)(x²-1)-(4x²-12x+9)
    = (x³+8)+(x³-6x²+12x-8)-6(x²+2x+1)-(3x³-12x²-12x)+(x³+3x²-x-3)-(4x²-12x+9)
    = x³+8+x³-6x²+12x-8-6x²-2x-1-3x³+12x²+12x+x³+3x²-x-3-4x²+12x-9
    = -x²+33x-13

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

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