math 代數

2010-04-08 5:16 am
計算2(x²-3)+(2-3x+x²)(x²-1)

回答 (2)

2010-04-17 6:12 am
✔ 最佳答案
 2(x²-3)+(2-3x+x²)(x²-1)
=2x²-6+(2-3x+x²)x²+(2-3x+x²)(-1)
=2x²-6+2x²-3x^3+x^4-2+3x-x²
=x^4-3x^3+2x²+2x²-x²+3x-6-2
=x^4-3x^3+3x²+3x-8

個答案應該岩
比最佳我XD

2010-04-16 22:13:59 補充:
^=Power
x²=x^2

我數學好good架=]

2010-04-16 22:30:20 補充:
我中一,連續所有小測都係我最高分XD,2次考試都係我第一(全級)晒命XD
2010-04-08 5:34 am
2(x²-3)+(2-3x+x²)(x²-1)
=2x²-6+(2x²-2-3x^3+3x+x^4-x²)
=3x²-8+3x-3x^3+x^4
=x^4-3x^3+3x²+3x-8

2010-04-07 21:37:17 補充:
^=Power e.g x²=x^2


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