Question

40 points. Find the sum and express it in the simplest form.

Answer 1

7u^3 - u^2 - 7 + 2u^3 - 4u^2

(7+2)u^3 -(1+4)u^2 - 7

9u^3 - 5u^2 - 7

Answer 2

This problem to the simplest form is $9u^{2} - 5u^{2} - 7$