Answer:
Explanation:
To find the sum of 7x^2+x+1 and -6x^2-8x-10, you can add the two expressions by combining like terms.
7x^2+x+1 + (-6x^2-8x-10)
= (7x^2 + -6x^2) + (x + -8x) + (1 + -10)
= x^2 + -7x + -9
Therefore, the sum of 7x^2+x+1 and -6x^2-8x-10 is x^2 - 7x - 9.