Answer:
[tex]-7x^2-14[/tex]
Step-by-step explanation:
First, remove the parenthesis. Remember to distribute the negatives properly!
[tex](-2x^2+x+1)-(x^2-x+7)-(4x^2+2x+8)\\-2x^2+x+1-x^2+x-7-4x^2-2x-8[/tex]
Next, rearrange the order of the numbers so it's easy to see the like terms. Put the squared x's together, x's together, etc. This step is optional but helpful.
[tex]-2x^2-x^2-4x^2+x+x-2x+1-7-8[/tex]
Next, combine like terms.
[tex]-7x^2+0x-14\\-7x^2-14[/tex]
Leave a note in the comments if you need me to elaborate on any steps.
