Answer:
-66x³ + 73x² - 4x
Step-by-step explanation:
First, expand the equation,
6x³ + 10x² - 4x + 63x² - 72x³
Now, we combine all the like terms
Using the rule of radicals
× ⇔
Simplifying the radicals
= = × = 2
= = × = 3
Thus
- 6(2) + 2(3) + 7
= - 12 + 6 + 7
=
4700 minus 1200 = 3500
round 4704 down to 4700 and 1193 up to 1200