Question

How do I completely factor y^2^x-y^x-20

Answer 1

Is the question correctly transcribed? Should it be:
y^(2x)-y^x-20?

Answer 2

\[y^{2x}-y^{x}-20\]

Answer 3

Yeah that is how it should be. my apologies

Answer 4

\[y^{2x}=(y^{x})^{2}\]
so we treat the expression as:
\[A^{2}-A-20\]
and factorise as you normally do.

Answer 5

awesome thank you so much