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

Toán Lớp 8: rút gọn biểu thức (x-2)(x^2-2x+4)(x+2)(x^2+2x+4) Cần gấp mn ơi

Toán Lớp 8: rút gọn biểu thức (x-2)(x^2-2x+4)(x+2)(x^2+2x+4)
Cần gấp mn ơi

Comments ( 2 )

  1. A = (x – 2)(x^2 – 2x + 4)(x + 2)(x^2 + 2x + 4)
    A = (x – 2)(x + 2)(x^2 – 2x + 4)(x^2 + 2x + 4)
    A = (x^2 – 4)(x^4 – 4x^2 + 16)
    A = x^6 – 4x^4 + 16x^2 – 4x^4 + 16x^2 – 64
    A = x^6 + (-4x^4 – 4x^4) + (16x^2 + 16x^2) – 64
    A = x^6 – 8x^4 + 32x^2 – 64      

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

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