Simplify.
20. (n^2 – 3n + 1) – (4n^2 + n – 5)
21.4y^2z(2y + 3z – 5)
22.(x – 8)(x + 5)
Please help, I need this by the end of the day, or may not pass. Please :(

Question

Simplify.
20.   (n^2 – 3n + 1) – (4n^2 + n – 5)
21.4y^2z(2y + 3z – 5)
22.(x – 8)(x + 5) 
Please help, I need this by the end of the day, or may not pass. Please :(

pfenn1 · Answer

20.$$(n^2 – 3n + 1) – (4n^2 + n – 5)=n^2-3n+1-4n^2-n+5$$Combine like terms.

anonymous · Answer

I need the answers please, I dont understand and this is my last project of the year. If you could do that I would thanks you times 10.

pfenn1 · Answer

$$(1-4)n^2+(-3-1)n+(1+5)=?$$

anonymous · Answer

I dont know, that's why i posted it on here. Please sir, I need this fast.