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erastovalidia [21]
3 years ago
5

Help plsssssssssssssssssssss

Mathematics
1 answer:
noname [10]3 years ago
7 0

Answer:

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 }}

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