How do u do this whats the answer

The answer would be 3 due to the adjacent angle being 6.8 and the half of your triangle already is completed with a 3.8 so just add 3 to that an you get 6.8 just like on the other side.

Name the two given polynomials as
f(x) = 19x³ + 44x²y + 17
g(x) = y³ - 11xy² + 2x²y - 13x³

Create the subtraction f(x) - g(x).
f(x)-g(x) = 19x³ + 44x²y + 17 - (y³ - 11xy² + 2x²y - 13x³)
             = (19 + 13)x³ + (44 - 2)x²y + 11xy² - y³ + 17
             = 32x³ - y³ + 42x²y + 11xy² + 17

D
Note that answer D has a typo. 11xy² is correct, but 11x²y is not.