How to factorize this polynomial
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08-23-2022, 12:02 PM
Post: #1
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How to factorize this polynomial
Hi all, I am learning math and learning how to use the HP Prime as well.
How do I factorize 4x^2+36xy+81y^2 and get (2x+9y)^2 as a result? Things I've tried in CAS view: - factor(4x^2+36xy+81y^2) -> 36xy+4x^2+81y^2 - factors(4x^2+36xy+81y^2) -> [4*x^2+81*y^2+36*xy,1] - simplify(4x^2+36xy+81y^2) -> 4x^2+36xy+81y^2 - collect(4x^2+36xy+81y^2) -> 4x^2+81y^2+36xy - cfactor(4x^2+36xy+81y^2) -> 4x^2+81y^2+36xy |
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08-23-2022, 05:16 PM
Post: #2
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RE: How to factorize this polynomial
(08-23-2022 12:02 PM)rancom Wrote: Hi all, I am learning math and learning how to use the HP Prime as well. You have to put the multiplication sign between the numbers, the variable "x" and the variable "y". |
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08-23-2022, 05:16 PM
Post: #3
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RE: How to factorize this polynomial
Add a * between x and y, otherwise xy is interpreted as a single variable with a name identifier of length 2.
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08-23-2022, 05:17 PM
Post: #4
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RE: How to factorize this polynomial
(08-23-2022 05:16 PM)robmio Wrote: [quote='rancom' pid='163314' dateline='1661256139'] You have to put the multiplication sign between the numbers, the variable "x" and the variable "y". |
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08-23-2022, 05:30 PM
(This post was last modified: 08-23-2022 05:31 PM by Steve Simpkin.)
Post: #5
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RE: How to factorize this polynomial
(08-23-2022 05:16 PM)robmio Wrote:(08-23-2022 12:02 PM)rancom Wrote: Hi all, I am learning math and learning how to use the HP Prime as well. I don't believe you have to put a multiplication symbol between a number and its variable when entering the equation. For example entering; factor(4x^2+36x*y+81y^2) appears to be automatically interpreted as factor(4*x^2+36x*y+81*y^2) without having to enter the * after the 4, 36 or 81. |
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08-23-2022, 05:35 PM
Post: #6
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RE: How to factorize this polynomial
(08-23-2022 05:30 PM)Steve Simpkin Wrote:(08-23-2022 05:16 PM)robmio Wrote: You have to put the multiplication sign between the numbers, the variable "x" and the variable "y". Wow, I didn't know. Thank you so much for letting me know this possibility. Regards, Roberto |
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08-23-2022, 05:48 PM
Post: #7
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RE: How to factorize this polynomial
It's beginning to look like Facebook here fellas, 1 or 2 of the same answers are probably enough... LOL
--Bob Prosperi |
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08-23-2022, 10:35 PM
Post: #8
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RE: How to factorize this polynomial
(08-23-2022 05:48 PM)rprosperi Wrote: It's beginning to look like Facebook here fellas, 1 or 2 of the same answers are probably enough... LOL Oh, go put a multiplication sign in that! I know that answers don't show up immediately for me so sometimes I answer a question that's been answered two or three times (or more!) before I see them. Tom L Cui bono? |
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08-24-2022, 07:48 AM
Post: #9
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RE: How to factorize this polynomial | |||
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