Now, I'm usually really good at factorisation, but this question completely threw me off..
Factorise 3m² + 4m
Now I'm used to questions like x² - 3x - 4 in which case the answer would be (x - 4) (x + 1). The question above I have been given is really fustrating for me because I don't know where to start really.
I think I would start with something like (3m.....) (m......) but I'm not sure where I would go from there. Any guidance would be geat
Math factorisation ?
2009-01-24 1:27 pm
回答 (8)
2009-01-24 2:06 pm
✔ 最佳答案
well, all you need is to use simple thinking.. do not hurt your brain and think of all the complicated stuff =) that will only cause confusionanyway... see what's common in both of them...that will be m..so::
3m² + 4m
= m( 3m + 4)
hope that helped =)
2009-01-24 4:36 pm
3m^2 + 4m
= m(3m + 4)
= m(3m + 4)
2009-01-24 1:39 pm
3m^2+4m
=m(3m+4) answer//
GCF: is m
=m(3m+4) answer//
GCF: is m
2009-01-24 1:39 pm
Factoring only means to write as a product in an interesting way... for example
3m² + 4m = m(3m+4)
But
3m² + 4m = 1(3m² + 4m) wouldn't be considered factoring, since 1 is a unit . Similarly 3(m² + 4/3m) wouldn't be factoring over the polynomials since 3 is a unit (it has a reciprocal). Also 3m² + 4m = 3/m(m^3+4/3 m^2) wouldn't be considered factoring over the polynomials since 3/m isn't a polynomial.
Think "express as an interesting product, but not too interesting" when someone says to factor something.
3m² + 4m = m(3m+4)
But
3m² + 4m = 1(3m² + 4m) wouldn't be considered factoring, since 1 is a unit . Similarly 3(m² + 4/3m) wouldn't be factoring over the polynomials since 3 is a unit (it has a reciprocal). Also 3m² + 4m = 3/m(m^3+4/3 m^2) wouldn't be considered factoring over the polynomials since 3/m isn't a polynomial.
Think "express as an interesting product, but not too interesting" when someone says to factor something.
2009-01-24 1:38 pm
both 4m and 3m^2 have m in common,so you can factorise m.
so 3m^2+4m=m(3m+4)
so 3m^2+4m=m(3m+4)
2009-01-24 1:36 pm
3(m+(2/3))^2-(4/3)
completing the square method.
completing the square method.
2009-01-24 1:34 pm
You can at best take 'm' common and write as 3m² + 4m =m(3m + 4)
When you think about usual methods and not the question in hand, the result is usually confusion
When you think about usual methods and not the question in hand, the result is usually confusion
2009-01-24 1:32 pm
3m² + 4m = m(3m + 4)
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