Answer:
3x⁷ + 7x⁴ + 2x + 7
Step-by-step explanation:
Before we begin, remember the following:
(-ve)*(-ve) = +ve
(-ve)*(+ve) = -ve
(+ve)*(-ve) = -ve
(+ve)*(+ve) = +ve
No, for the given, we have:
(3x⁷ + 8x⁴ +7) - (x⁴ - 2x)
First, we will remove the brackets based on the rules above. This will give us:
3x⁷ + 8x⁴ +7 - x⁴ + 2x
Now, we will add the like terms as follows:
3x⁷ + (8-1) x⁴ + 2x + 7
This will give us the final expression:
3x⁷ + 7x⁴ + 2x + 7
Hope this helps :)