Answer
6a³ + 4b²
Step-by-step explanation
Given the expression:
[tex]2a\times a\times3a+b\times4b[/tex]Combining similar terms (terms with the same variable):
[tex]\begin{gathered} (2a\times a\times3a)+(b\times4b)= \\ =\lbrack(2\times3)(a\operatorname{\times}a\operatorname{\times}a)\rbrack+\lbrack4(b\operatorname{\times}b)\rbrack= \\ =6a^3+4b^2 \end{gathered}[/tex]