WORTH 20 POINTS FIRST ANSWER IS MARKED BRAINLIEST.Im confuzzled. we are doing polynomials in class, but I don't get them without a teacher explaining it on the board. This quarantine thing has brought my grades down, and i REALLY need help.

Answer:
The answer to your question is There are four terms in the product
The product is degree 2.
Step-by-step explanation:
Product (-d + e)(4e + d)
Process
1.- Multiply "-d" by the two terms of the second parentheses
- (-d)(4e) = -4de You have to multiply the signs, then the numbers and
finally the letters.
- (-d)(d) = -d²
2.- Multiply "e" by the two terms of the second parentheses
-(e)(4e) = 4e²
-(e)(d) = ed
3.- Write all the results together
-4de - d² + 4e² + ed
-Simplify like terms
4e² -3de - d²