the answer is 3n-2 please do you get it
Answer:
C. 2(x + 10)(x - 10)
Step-by-step explanation:

-- 'Truncated' to one decimal place, it's 9.9 ,
-- 'Rounded' to one decimal place, it's 9.9 .
(These two operations don't always produce the same result.)
Two polynomials are equal if the coefficients are equal.
