Answer:
[tex]5j^3 + 10j^2 +7j+19 [/tex]
Step-by-step explanation:
[tex](8j^3 + 3j^2 + 7) - (3j^3 - 7j^2 - 7j - 12)[/tex]
To simplify it we need to remove the parenthesis
WE multiply the negative sign inside the parenthesis'
[tex]8j^3 + 3j^2 + 7- 3j^3 + 7j^2 + 7j + 12[/tex]
Now we combine like terms
[tex]8j^3 - 3j^3 =5j^3[/tex]
[tex]3j^2 +7j^2=10j^2[/tex]
[tex]7+12=19[/tex]
Expression becomes
[tex]5j^3 + 10j^2 +7j+ 19 [/tex]
