Silly question about solver

[mop80087]

Hi,

I have a silly question, sorry...

why when I put in "cas nspire": solver(x^2-2^x=0, x)
i get results x=-0,766... or x=2 or x=4

but in my HP Prime when i put: solver(x^2-2^x=0, x)
i have only one result x=2

Why?

or is there another way to get all the possible results of an equation?

Cumprimentos/Sincères salutations/Cordiali saluti/
Best regards/Mit freundlichen Grüßen/Saludos
Diamantino Valente
Portugal