im subtracting
5x^4+3x^2-2x
-5x^4-3x^2+9x
_______________
0x^4+x^2+7x
is this right?
yes
If this is your problem
(5x^4 + 3x^2 - 2x) - (-5x^4 - 3x^2 + 9x)
Answer is
10x^4 + 6x^2 - 11x
thanks
If they're not in parenthesis, the answer is 7x
Write out exactly how it is in the book.
To check if the subtraction is done correctly, we can simplify the expression and confirm if it matches your result.
Let's break it down step by step:
1. Distribute the negative sign to every term in the second expression:
-5x^4 - 3x^2 + 9x becomes (-5x^4) + (-3x^2) + (9x).
2. Combine like terms:
(-5x^4) - (5x^4) = 0x^4
(3x^2) - (-3x^2) = 6x^2
(-2x) - (9x) = -11x
Thus, the simplified expression after subtraction is:
0x^4 + 6x^2 - 11x.
Comparing this with your result, we see that there is a mistake. The correct simplified expression should be 0x^4 + 6x^2 - 11x, not 0x^4 + x^2 + 7x.
Therefore, the subtraction is not right, and you should review the calculation to find where the mistake occurred.