Question

Find the difference.

(9x2 + 10x + 4) − (9x2 + 5x − 1)

(a) 5x + 5
(b) 15x + 3
(c) x2 + 5x + 5
(d) x2 + 15x + 3

Answer 1

[9x2+10x+4]-[9x2+5x-1]
9x2-9x2 gone
10x-5x=5x
4-[-1]=5
ans=5x+5 opt a

Answer 2

For this case we have the following polynomials:

`(9x ^ 2 + 10x + 4) (9x ^ 2 + 5x - 1)`
Subtracting both polynomials we have:

`(9x ^ 2 + 10x + 4) - (9x ^ 2 + 5x - 1)`
We group terms with the same exponent:

`(9x ^ 2 - 9x ^ 2) + (10x - 5x) + (4 - (-1))`
Rewriting we have:

`(9x ^ 2 - 9x ^ 2) + (10x - 5x) + (4 +1) 5x + 5`
Answer:
The difference is given by:
(a) 5x + 5