Explanation:
what do you need to do ?
the only thing we can do here without any further information is simplification if the expression:
-23x² + x² - 6x + 10 + 2x²
now we group ask the terms of the same variable exponents :
-23x² + x² + 2x² - 6x + 10
-20x² -6x + 10
we could do
2×(-10x² - 3x + 5)
but I personally don't find this more simplified that the previous form.