Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable.
6a^4+162a/3a^4−9a^3+27a^2
6a^4+162a/3a^4-9a^3+27a^2
6a^3*a+6*27a/3a^4-9a^3+27a^2
6a(a^3+27)/3a^4-9a^3+27a^2=
6a(a^3+27)/a^2(3a^2-9a+27)
Done , look back to your previous of this.
Did you notice the "difference of cubes" factoring ?