Question

Which is a factor of 16x^3 + 250 ?
Choose one answer.
a. 2x - 5
b. 4x^2 + 10x + 25
c. 4x^2 + 20x + 25
d. 2x + 5

Answer 1

What do you think?

Answer 2

b

Answer 3

You can factor 2 out of that
f(x)=2(8x^3+125)
Then trial by error if you prefer,
f(-5/2)=0
f(-5/2)=8(-5/2)^3+125=0

So -5/2 is a factor of f(x)

Answer 4

Then you get 2x+5

Answer 5

x=-5/2
2x=-5
2x+5=0

Answer 6

You there?