Question

again asking this and if you know the answer only then answer and full explanation no spam please​

Answer 1

Answer:

2)degree=3

3)59

Step-by-step explanation:

5x^3+4x^2+7x

degree=3

(8+√5)(8-√5)

use formula (a+b)(a-b) =a^2-b^2

=8^2-(√5)^2

=64-5

=59