Question

(4 + 3x + x2) + (6 – 9x + x2)

Answer 1

Have to use the commutative property to record the like terms then collect the like terms Then remove the unnecessary ( ) then collect the terms and ur answer is 10-2x

Answer 2

If your looking for a simplified answer, it would be $2x^2-6x+10$.

Hope this helps.