Answer:
[tex]8b^5+12b^3[/tex]
Step-by-step explanation:
Multiply [tex]4b^2[/tex] by each term inside of the parenthesis.
[tex]4b^2*2b^3=8b^5[/tex]
Multiply 4 & 2 normally, getting 8. When multiplying numbers with exponents, you add the exponents. 2+3=5.
[tex]4b^2*3b=12b^3[/tex]
Multiply 4 & 3 normally, getting 12. Whenever a number has a variable, the variable has an exponent of 1. So when you add the exponents, you get 2+1=3.
