Question

Factor out the common factor. 2x4 + 5x3 – 8x –20 (x3 + 4)(–2x – 5) (x3 – 4)(2x + 5) (x3 + 4)(2x + 5)

Answer 1

Answer:

$(x^3-4)(2x+5)$

Step-by-step explanation:

$2x^4 + 5x^3 - 8x -20$

To factor this we use grouping method

$(2x^4 + 5x^3)+(- 8x -20)$

Take out GCF from each group. x^3 is the GCF for first group and -4 is the GCF from second group

$x^3(2x+5)-4(2x+5)$

Now we factor out 2x+5

$(x^3-4)(2x+5)$

Answer 2

Answer:

The common factor is (x3 – 4)(2x + 5)

Step-by-step explanation:

1. find gcf

2. factor out the gcf

3. use grouping