(1-10x)^4 does not expand

[MullenJohn]

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!

[Aries]

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

[MullenJohn]

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!

[Aries]

Try CAS.expand('expression') or CAS.expand('expression','variable') in HOME mode
Algebric objects need single quotes.
Best,

Aries

[DrD]

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.

[MullenJohn]

Aries & DrD,

Thank you for replies. It is clear to me now. Cheers!

[Aries]

Dont mention it !
Best,

Aries