Hi;

got this questionGiven thatx -2 is a factor of the polynomial x^3 - kx^2 -24x + 28, find k.

I get k=-3 they get k=3.

Pretty sure I'm right just need confirmation.

Thanks.

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- Aug 5th 2012, 06:25 AManthonyehelp with this polynomial
Hi;

got this questionGiven thatx -2 is a factor of the polynomial x^3 - kx^2 -24x + 28, find k.

I get k=-3 they get k=3.

Pretty sure I'm right just need confirmation.

Thanks. - Aug 5th 2012, 06:37 AMskeeterRe: help with this polynomial
confirm it yourself ...

$\displaystyle f(x) = x^3 + 3x^2 - 24x + 28$ if $\displaystyle k = -3$

or

$\displaystyle f(x) = x^3 - 3x^2 - 24x + 28$ if $\displaystyle k = 3$

which one yields $\displaystyle f(2) = 0$ ? - Aug 5th 2012, 09:59 AManthonyeRe: help with this polynomial
Got it thanks Skeeter its the top one.