發問時間: 科學數學 · 5 年前

因式分解下列各式: 1.4x²-4y²+x-y 2.9x²-9y²-2x-2y?

2 個解答

評分
  • pui
    Lv 4
    5 年前
    最佳解答

    1.

    4x^2-4y^2+x-y

    =4(x^2-y^2)+(x-y)

    =4(x+y)(x-y)+(x-y)

    =(x-y)(3x-3y)

    =3(x-y)(x-y)

    2.

    9x^2-9y^2-2x-2y

    =9(x^2-y^2)-2(x+y)

    =9(x-y)(x+y)-2(x+y)

    =(x+y)(9x+9y-2)2

  • 5 年前

    1. 4x²-4y²+x-y

    =4(x²-y²)+(x-y)

    =4(x-y)(x+y)+(x-y)

    =(x-y)(4x+4y+1)

    2. 9x²-9y²-2x-2y

    =9(x²-y²)-2(x+y)

    =9(x-y)(x+y)-2(x+y)

    =(x+y)(9x-9y-2)

還有問題?馬上發問,尋求解答。