Question

Is x+2 a factor of 2x^3-12x^2+8x-7?

Answer 1

@wednesday09876 How do you usually work these? By that, I mean are you studying long division, synthetic division, or maybe something else?

Answer 2

just verifying that what i have is right, because its very important that i get these answers right.

Answer 3

SO heres how i usually work them

Answer 4

for x+2 and
2x^3-12x^2+8x-7

Answer 5

I take -2 and plug it in for x, and if it equals zero, it is a factor

Answer 6

if we solve x+2=0, we get x=-2
substitute x=-2 to 2x^3-12x^2+8x-7, would be zero ?

Answer 7

yeah just making sure
thanks

Answer 8

yw

Answer 9

I got -87 and not 0. I'll check my work.
@wednesday09876

Answer 10

>>substitute x=-2 to 2x^3-12x^2+8x-7, would be zero ?
NO @RadEn Please check your work. Thanks.

Answer 11

> because its very important that i get these answers right.
@wednesday09876

Not a factor by my calculations. RadEn is checking.

Answer 12

yeah i calculate it cant be 0 b but - ... , so it's not a factor of ...

Answer 13

Sorry of the confusion, i knew it wasnt a factor, i did the work out, i was just saying that in the case that it was 0, it would be a factor

Answer 14

No worries.
@wednesday09876
I answered this question: Is x+2 a factor of 2x^3-12x^2+8x-7?
And, the answer is No.