Question

Perform the indicated operation by removing the parentheses and combining like terms.(-3x2 - 9x – 3) + (9x2 + x + 5)

Answer 1

Given the initial expression

`(-3x^2-9x-3)+(9x^2+x+5)`

Simplify as shown below

`\begin{gathered} \Rightarrow(-3x^2-9x-3)+(9x^2+x+5)=-3x^2-9x-3+9x^2+x+5 \\ =(-3x^2+9x^2)+(-9x+x)+(-3+5) \\ =6x^2-8x+2 \\ \Rightarrow(-3x^2-9x-3)+(9x^2+x+5)=6x^2-8x+2 \end{gathered}`

Therefore, the answer is 6x^2-8x+2