Anonymous
Anonymous asked in 科學數學 · 1 decade ago

Mathematics Use of Formulae

1. (a) a(b-c)

(b) 2x^2+x-15

(c) Using the results of (a) and (b), and let a = 2x, b = x+3 and c = 5,

factoriza 2x^2+x-15.

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1 Answer

Rating
  • baba
    Lv 5
    1 decade ago
    Favorite Answer

    用(a)和(b)的結果,而且讓a = 2x, b = x+3 and c = 5,將2x^2+x-15作因式分解

    題目的意思是2x^2+x-15因式分解後,用a = 2x, b = x+3 and c = 5取代之

    2x^2+x-15 (十字交叉)

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

    = b (a-c)

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