maths questions[10marks]

2008-11-02 11:11 pm

1. -12+27a^4 = 27a^4-12?
2.-12+27a^4 = ? please calculate
3.8m^3-12m^2+2m+5= ? please calculate
4.(h^-2k^-2) / (h^-1+k^-1) = ? please calculate

回答 (1)

2008-11-07 12:29 am

✔ 最佳答案

-12+27a^4 is = 27a^4-12
because -12+27a^4 = -(-27a^4+12) = 27a^4-12

3 8m^3-12m^2+2m+5
=2m(4m^2-6m+2)+5
=2m[(4m-2)(m-1)]+5

4(don't understand (睇唔明)

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