Answer:

Step-by-step explanation:
1) In this question we've been given "a", the leading coefficient. and two roots:

2) There's a theorem, called the Irrational Theorem Root that states:
If one root is in this form
then its conjugate
. is also a root of this polynomial.
Therefore

3) So, applying this Theorem we can rewrite the equation, by factoring. Remembering that x is the root. Since the question wants it in this expanded form then:

I believe it's A, sorry if it's incorrect. ^-^'
Answer:

or

Step-by-step explanation:





Factor.

Extract the square root.

Add 5

or

Step-by-step explanation:
48 us the correct answer