Question

Which of the following is a factor of 5x3 + 320?

A. 5
B. x + 4
C. x2 − 4x + 16
D. All of the above

Answer 1

Option D all of the above.

Explanation:

The given expression is 5x³ + 320

5x³ + 320 = 5 (x³ + 64)

= 5 [x³ + 4³]

= 5[( x+4 ) ( x² + 16 - 42 )]

So these are three factors 5,(x + 4) and ( x² + 16 - 4x )

Therefore, Option D all of the above is the answer.