(1-10x)^4 does not expand - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: (1-10x)^4 does not expand (/thread-12779.html) (1-10x)^4 does not expand - MullenJohn - 04-10-2019 06:29 PM 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! RE: (1-10x)^4 does not expand - Aries - 04-10-2019 06:45 PM 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 RE: (1-10x)^4 does not expand - MullenJohn - 04-10-2019 06:59 PM 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! RE: (1-10x)^4 does not expand - Aries - 04-10-2019 07:13 PM Try CAS.expand('expression') or CAS.expand('expression','variable') in HOME mode Algebric objects need single quotes. Best, Aries RE: (1-10x)^4 does not expand - DrD - 04-10-2019 07:57 PM 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. RE: (1-10x)^4 does not expand - MullenJohn - 04-10-2019 08:26 PM Aries & DrD, Thank you for replies. It is clear to me now. Cheers! RE: (1-10x)^4 does not expand - Aries - 04-11-2019 06:21 AM Dont mention it ! Best, Aries