Question

If g(x) = 5x2^2 - 10x + 9 and h(x) = -3x3^3+ 5x - 6, find g(x) - h(x)?

A)
3x3 + 5x2 +15x + 15
3x3 - 5x2 - 15x + 15
C)
-3x3 + 5x2 - 5x + 3
D)
3x3 + 5x2 - 15x + 15

Answer 1

Answer: B

Step-by-step explanation: Hope it helps :)

Answer 2

B)
`g(x) - h(x) =  3x^3 - 5x^2 - 15x + 15`

Explanation:

Here, the given functions are:

`g(x) = 5x^2- 10x + 9 \\h(x) = -3x^3+ 5x - 6`

Now, g(x) - h(x) is :

`(5x^2- 10x + 9)  - ( -3x^3+ 5x - 6)\\= 5x^2- 10x + 9 + 3x^3 - 5x + 6\\= 3x ^3 + 5x ^2+  (-10 x - 5 x) + (9 + 6)\\= 3x^3 - 5x^2 - 15x + 15`

⇒
`(5x^2- 10x + 9)  - ( -3x^3+ 5x - 6) =  3x^3 - 5x^2 - 15x + 15`

B) Hence,
`g(x) - h(x) =  3x^3 - 5x^2 - 15x + 15`