(1-10x)^4 does not expand
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04-10-2019, 06:29 PM
Post: #1
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(1-10x)^4 does not expand
Help, In HOME with HP Prime,
I enter (1-10x)^4 and expect something like #x^4+#x^3+#x^2+#x+c where # is any number. However my result is (1.-10x)^4 which is just what I started with. How do I get the binomial raised to the 4th power to expand? Thanks - Cheers! |
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04-10-2019, 06:45 PM
Post: #2
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RE: (1-10x)^4 does not expand
Hi,
expand is an algebric CAS command, you can use it for polynomials and rational functions (powexpand for expressions with exponents and texpand for transcendent functions) ![]() Best, Aries ![]() |
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04-10-2019, 06:59 PM
Post: #3
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RE: (1-10x)^4 does not expand
Aries, Thank you for your reply.
I am still confused. Are you saying that I cannot directly input (1-10x)^4 in the HOME textbox and get the expansion. Are you saying I must use the powexpand command in the CAS textbox to get the expansion? Cheers! |
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04-10-2019, 07:13 PM
Post: #4
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RE: (1-10x)^4 does not expand
Try CAS.expand('expression') or CAS.expand('expression','variable') in HOME mode
![]() Algebric objects need single quotes. Best, Aries ![]() |
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04-10-2019, 07:57 PM
Post: #5
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RE: (1-10x)^4 does not expand
Either of these should work:
[HOME] CAS("expand((1-10*x)^4)"); CAS.expand("(1-10*x)^4"); Note the multiplication sign at 10*x, to avoid implicit multiplication issues. |
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04-10-2019, 08:26 PM
Post: #6
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RE: (1-10x)^4 does not expand
Aries & DrD,
Thank you for replies. It is clear to me now. Cheers! |
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04-11-2019, 06:21 AM
Post: #7
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RE: (1-10x)^4 does not expand
Dont mention it !
Best, Aries ![]() |
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