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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: bobisnotmyname on March 02, 2015, 09:45:23 am

Title: Which ti-nspire version?
Post by: bobisnotmyname on March 02, 2015, 09:45:23 am: Hey, guys
I'm using the ti-nspire version 3.0.3.1791 and I notices that I could not factorise a function properly (the calculator just gave me the function that I put in). My friend however has a newer version 3.1....... and his could factorise the question. So my question is, does updated versions do that sort of thing, being able to factorise equations that older versions couldn't?
Title: Re: Which ti-nspire version?
Post by: 99.90 pls on March 02, 2015, 08:50:57 pm: Version shouldn't make a significant difference.

What expression are you trying to factorise? Try to add ,x to the end of the function as well. For instance, factor(x^2 + 2x,x).

Also try cFactor(x^2 + 2x,x) or cFactor(x^2 + 2x).
Title: Re: Which ti-nspire version?
Post by: bobisnotmyname on March 02, 2015, 09:15:07 pm: Quote from: 99.90 pls on March 02, 2015, 08:50:57 pm
Version shouldn't make a significant difference.

What expression are you trying to factorise? Try to add ,x to the end of the function as well. For instance, factor(x^2 + 2x,x).

Also try cFactor(x^2 + 2x,x) or cFactor(x^2 + 2x).
cFactor(x^3-4x^2+14x-21)
Title: Re: Which ti-nspire version?
Post by: 99.90 pls on March 02, 2015, 09:16:35 pm: Quote from: bobisnotmyname on March 02, 2015, 09:15:07 pm
cFactor(x^3-4x^2+14x-21)

Adding ,x solves the problem, although you probably want to set your calculator to polar form.
Title: Re: Which ti-nspire version?
Post by: bobisnotmyname on March 02, 2015, 09:27:03 pm: Quote from: 99.90 pls on March 02, 2015, 09:16:35 pm
Adding ,x solves the problem, although you probably want to set your calculator to polar form.
Did your answer have "normal" factors or some crazy ones :). cause i just get these really messy factors
Title: Re: Which ti-nspire version?
Post by: 99.90 pls on March 02, 2015, 09:29:09 pm: Quote from: bobisnotmyname on March 02, 2015, 09:27:03 pm
Did your answer have "normal" factors or some crazy ones :). cause i just get these really messy factors

Yeah, mine are messy too. I think it means that it's not something which can be expressed as an exact value.
Title: Re: Which ti-nspire version?
Post by: bobisnotmyname on March 02, 2015, 09:32:21 pm: Quote from: 99.90 pls on March 02, 2015, 09:29:09 pm
Yeah, mine are messy too. I think it means that it's not something which can be expressed as an exact value.
OK, thanks a lot. I just thought my calculator was playing up, but mine isn't the only one. I will try to find the problem out tomorrow. Again thanks :)
Title: Re: Which ti-nspire version?
Post by: Stevensmay on March 03, 2015, 12:34:24 am: I'm not sure there is something wrong so much as the equation just doesn't factorize nicely.

There isn't really a nicer way of writing (x-2.09799) (x-(0.951007+3.01748 i)) (x-(0.951007-3.01748 i))
Title: Re: Which ti-nspire version?
Post by: bobisnotmyname on March 03, 2015, 09:55:15 am: thanks for your help guys I fixed the problem, just had a wrong number in the function is all. Again thanks for your help :)