Question

Simplify.

(y^3)^5 · y^4

==

y^19??

I'm trying to get this!

Answer 1

Bravo, Study Gurl. I see you've been studying! :)

Answer 2

(y^3)^5= is not y^8

Answer 3

... you mulitply there.. its y^15..

Answer 4

Because....
\[(y^{n})^{m} = y^{n (m)}\]
and
\[y^{n} * y^{m} = y^{n + m}\]

\[(y^{3})^{5} = y^{15}\]
\[y^{15} * y^{4} = y^{19}\]