Anonymous
Anonymous asked in 教育及參考書小學及中學教育 · 1 decade ago

f.1 algebraic expressions(20分)

simplify the following expressions

x代表英文符號,*代表次方,eg:*2=二次方

1.(3x*2-2x-3)-(x*2-4x+1)

2.(7-h)-(3+h)-(2h+1)

3.(-4ab*2 b*5)(-2abc*3)

4.-18x*3 y+48x*2 y*2-54xy*3+6X*2 y÷-6xy

1 Answer

Rating
  • wkho28
    Lv 7
    1 decade ago
    Favorite Answer

    simplify the following expressions

    1. (3x2–2x–3)–(x2–4x+1)

    = 3x2–2x–3–x2+4x–1

    = 2x2+2x–4

    = 2(x2+x–2)

    2. (7–h)–(3+h)–(2h+1)

    = 7–h–3–h–2h–1

    =3–4h

    3. (–4ab2b5)(–2abc3)

    =8a1+1b2+5+1c3

    =8a2b8c3

    4. 看似漏了括號, 如有錯漏或不清楚的地方請提出來討論。

    (–18x3y+48x2y2–54xy3+6X2y)(–6xy)

    =–6xy(3x2–8xy+9y2–x)/(–6xy)

    =3x2–8xy+9y2–x

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