Answer:
2x² - 8x + 3
Step-by-step explanation:
( 3x² - 5x +3) + (-x² - 3x)
= 3x² - 5x +3 - x² - 3x
= 3x² - x² - 5x - 3x + 3
= 2x² - 8x + 3
720.
1*2*3*4 * 5*6
= 24 * 30
= 720.
Splitting it up in this way makes it easier.