Answer
$-3x^2+6x-2$
Work Step by Step
By combining like terms, the given expression, $
(x^2+6x+3)+(-4x^2-5)
$, simplifies to
\begin{array}{l}
(x^2-4x^2)+6x+(3-5)
\\\\=
-3x^2+6x-2
.\end{array}
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.