Question

Can someone help me with polynomials?

Subtract
(2n^2+4n+5)–(2n^2+3n+4)

Answer 1

(2n^2+2n^2)+(4n+3n)+(5+-4) Am I doing this problem right?

Answer 2

You have the right idea, but you forgot most of the minus signs.

Answer 3

What did I forget?

Answer 4

Try showing more of your steps, like this:
\[(2n^2 + 4n + 5)-(2n^2+3n+4)\]
The entirety of the second polynomial is subtracted from the first, so this becomes:
\[(2n^2 + 4n + 5)-2n^2-3n-4\]
Now try combining like terms as you did earlier.

Answer 5

11n^2-9^2