Answer:
Step-by-step explanation:
[tex](4x + 2)(5 {x}^{2} + 10x + 3)[/tex]
Multiply the second parentheses by each term from the first parentheses
[tex]4x( {5x}^{2} + 10 x + 3) + 2(5 {x}^{2} + 10x + 3) [/tex]
Distribute 4x through the parentheses
[tex]20 {x}^{3} + 40 {x}^{2} + 12x + 2(5 {x}^{2} + 10x + 3)[/tex]
Distribute 2 through the parentheses
[tex]20 {x}^{3} + 40 {x}^{2} + 12x + 10 {x}^{2} + 20x + 6[/tex]
Collect like terms
[tex]20 {x}^{3} + 50 {x}^{2} + 32x + 6[/tex]
Hope this helps...
Best regards!!