Question

What is the exact value of the expression . 6 sqrt y^8-sqrt 9y^4+ 3 sqrt y^8 - sqrt y^4
Simplify if possible.
Please with steps

Answer 1

\[6\sqrt{y^8}=6y^4\]
\[-\sqrt{9y^4}=-3y^2\]
\[3\sqrt{y^8}=3y^4\]
\[-\sqrt{y^4}=-y^2\]
combine like terms for the last step