Question

Help plsssssssssssssssssssss

Answer 1

Question 10:

Answer: b.

`{ \tt{f(x) = 5 {x}^(2) + 9x - 4}} \\ { \tt{g(x) = - {8x}^(2) - 3x - 4 }}`

(f + g)x, add f(x) and g(x):

`{ \tt{(f + g)x = (5 - 8) {x}^(2) + (9 - 3)x - 4 - 4}} \\ { \tt{(f + g)x = - 3 {x}^(2) + 6x - 8}}`

Question 11:

Answer: a.

In relation with solution of question 10, same procedure:

`{ \tt{(f - g)x = - 3 {x}^(3) + (1 - 2) {x}^(2) + ( - 3 - 4)x + 9 - ( - 9)}} \\ { \tt{(f - g)x = - 3 {x}^(3) - {x}^(2) - 7x + 18 }}`