Simplify:
Q 1. (x^2-3)-(4x^2-6x-1)
Q.2 (x+2)(x-4)-(2x+3)(x-1)
F.2 Maths Questions. 2
2009-02-06 7:06 am
回答 (1)
2009-02-06 7:19 am
✔ 最佳答案
1. (x^2-3)-(4x^2-6x-1)= -3x^2+6x-2
2. (x+2)(x-4)-(2x+3)(x-1)
= (x^2-2x-8)-(2x^2=x-3)
= -(x^2+3x+5)
2009-02-05 23:20:14 補充：
Pay attention that for Q2, -x^2-3x-5 is also acceptable, depending on whether you want to factorize (-1) or not.
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