Question

Plz answer the 18 question

Answer 1

hope this helps you☺️☺️

Answer 2

Answer:

Step-by-step explanation:

if x-1 and x+2 are the factor of 2x³ +nx² - x - n

then x= 1, -2 will satisfy the f=given equation when equated to zero

therefore,

putting x=1

2 +m - 1 - n = 0

m-n= -1

-16 +4m +2 - n = 0

4m - n = 14

-(m - n = -1)

......................

3m = 15

m = 5

5 - n = -1

n = 6

m² -  n² = 5² - 6² = 25 - 36 = -11