math problem?

1 ⤊

1. (2ab^2)(-3abc^2)(5a^2c)
2. 1/x+3 - 2x/ x^2+6x+9
3. 5x^2/-5x

2007-12-11 05:41:36 · 2 answers · asked by brock.young 1 in Science & Mathematics ➔ Mathematics

4. write scientific notation of 0.0000000391

2007-12-11 05:46:40 · update #1

1. -30a^4b^3c^3
3.-x
2. 1/(x+3) - 2x/(x+3)^2
=(x+3 - 2x)/(x+3)^2
-(x+3)/(x+3)^2=-1/(x+3)

2007-12-11 05:48:41 · answer #1 · answered by norman 7 · 0⤊ 0⤋

Since the guy before me answered the others, 4 is)
391 to the power of minus 8

2007-12-11 13:51:15 · answer #2 · answered by Anonymous · 1⤊ 0⤋