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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

bobbym
2012-11-29 00:30:59

I think you are going to find that is irreducible in Q and therefore in Z.

bob bundy
2012-11-28 23:55:10

What do you get if you multiply out the brackets and simplfy?

Bob

deiv
2012-11-28 23:34:45

How about this one? What are the factors of:
3x(x+2y) + 4y(3x+2y)

bobbym
2012-11-28 23:19:05

Hi;

Or take it over to Wolfram.

bob bundy
2012-11-28 22:41:01

hi deiv

Welcome to the forum.



You can simplify the problem by making the substitution



Then it becomes



I notice that x = -1 makes this expression zero, so by the factor theorem (x + 1) is a factor.

From there you can easily get the quadratic that goes with this and you'll find the formula will give another two factors.

Then you can go back to the m expression from there.

Bob

deiv
2012-11-28 21:07:15

Pls factor completely: (m^9)-(3m^3)-2
tnx....

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