simplify does that mean.. (2 Viewers)

DivJx

New Member
Joined
Feb 18, 2006
Messages
9
Gender
Undisclosed
HSC
N/A
When something says simplify does that mean that it should be written in factored form if possible?
 

DivJx

New Member
Joined
Feb 18, 2006
Messages
9
Gender
Undisclosed
HSC
N/A
I understand that but does it mean that if the result can be factorised even though it doesn't say to are we expected to write it in factored form.
For example if the once we evaluate a particular question and get an answer of 2xy^2+2yx^2 do we leave it like that or do we write it as: 2xy(y+x) even though the question doesn't say to factorise?
 

airie

airie <3 avatars :)
Joined
Nov 4, 2005
Messages
1,143
Location
in my nest :)
Gender
Female
HSC
2007
I thought simplifying and factorising are opposites? o.0 For example, simplifying a polynomial would require you to expand all brackets and colelct like terms etc etc while factorising writes a polynomial as the product of its factors?
 

abcd9146

Member
Joined
Dec 4, 2005
Messages
107
Gender
Male
HSC
2006
airie said:
I thought simplifying and factorising are opposites? o.0 For example, simplifying a polynomial would require you to expand all brackets and colelct like terms etc etc while factorising writes a polynomial as the product of its factors?
to factorise means to use brackets
to expand means to remove brackets

:)
 

vandy88

New Member
Joined
Feb 6, 2006
Messages
6
Gender
Female
HSC
2006
simplfy means to put it in the simplest form possible so you do not factorise but you do take out any foctors that you can without factorising esp in the case of fractions
 

m0ofin

Member
Joined
Oct 5, 2005
Messages
932
Gender
Undisclosed
HSC
N/A
airie said:
I thought simplifying and factorising are opposites? o.0 For example, simplifying a polynomial would require you to expand all brackets and colelct like terms etc etc while factorising writes a polynomial as the product of its factors?
Simplifying and factorising aren't really opposites. Expanding is the opposite of factorising and simplify is collecting like terms, as you've said.
 

Riviet

.
Joined
Oct 11, 2005
Messages
5,593
Gender
Undisclosed
HSC
N/A
Simplify is too broad to be the opposite of factorising; as others have previously said, the correct word to use is expanding.
To simplify is to make something as simple as possible; factorising does not simplify, instead it changes the form. Depending on the question, it MIGHT be wiser to factorise or leave expanded.
 

Mountain.Dew

Magician, and Lawyer.
Joined
Nov 6, 2005
Messages
825
Location
Sydney, Australia
Gender
Male
HSC
2005
as a general rule of thumb, leave it expanded, in the least number of terms possible. usually, when they want a factorised form, they will either tell u in the question, or have "Show/prove that <insert factorised equation>"
 

Users Who Are Viewing This Thread (Users: 0, Guests: 2)

Top