SUBTRACTING...

5x^4+3x^2-2x
-
5x^4-3x^2+9x
_______________
0x^4+x^2+7x

is this right?

Please don't repost without checking your 1st post for an answer.

See your post below.

To subtract (5x^4 + 3x^2 - 2x) - (5x^4 - 3x^2 + 9x), we need to combine like terms.

First, let's simplify the terms within each polynomial:
- (5x^4 - 3x^2 + 9x) becomes -5x^4 + 3x^2 - 9x.

Now we can perform the subtraction:

(5x^4 + 3x^2 - 2x) - (5x^4 - 3x^2 + 9x) =
5x^4 + 3x^2 - 2x - 5x^4 + 3x^2 - 9x.

Next, we can combine like terms:

(5x^4 - 5x^4) + (3x^2 + 3x^2) + (-2x - 9x) =
0x^4 + 6x^2 - 11x.

Therefore, the simplified expression is 0x^4 + x^2 + 7x.