5765 asked in 教育及參考書教學 · 1 decade ago

10分.急!*F.2 Maths { Identity & Factorization =] } 中英都得...Thx

吾該=]

Please give me some questions about Identities and Factorization. [ Including answers ]

1 Answer

Rating
  • 1 decade ago
    Favorite Answer

    Identity,恆等式.要去證明兩個數是否相等.

    Example:

    Provethat the following equation is identity.

    (a) 5(x-2)=2(x-5)=3x

    L.H.S=5(x-2)

    =5x-10

    R.H.S=2(x-5)=3x

    2x-10=3x

    =5x+10

    L.H.S=R.H.S

    answer: 5(x-2)=2(x-5)+3x ====個等號要三條線.

    Prove that 3(x+1)+2(3x-5)=6(x-1)+10 is NOT identity.

    L.H.S=3(x+1)+2(3x-5)

    =3x+3+6x-10

    6x+4

    L.H.S.=R.H.S ====個等號中間要有條斜線.

    3(x+1)+2(3x-5)=6(x-1)+10 is not identity.

    Factorization.因式分解.

    Example:

    Factorize 14y^4 + 21y^3 -7y^2

    = 7y^2 (2y^2) + 7y^2 (3y)-7y^2(1)

    answer =7y^2 (2y^2+3y-1)

    我都係讀緊中2,啱啱教完.Hope that can help you.

Still have questions? Get your answers by asking now.