Question

3. Simplify (42? +9x + 2) + (-20% + 2x - 3)

Answer 1

$\begin{gathered} (3x^2^{}-5x+3)+(-3x^2+5x-3) \\ \end{gathered}$

so we group

$\begin{gathered} (3x^2-3x^2)+(-5x+5x)+(3-3) \\ 0+0+0 \\ =0 \end{gathered}$