If x>2 thenx=^{2}-x-6

x_{2-}4

can you show with steps please thank you!

Printable View

- December 5th 2012, 11:12 AMsomeguy123If x>2
If x>2 then

__x__=^{2}-x-6

x_{2-}4

can you show with steps please thank you! - December 5th 2012, 11:51 AMtopsquarkRe: If x>2
- December 5th 2012, 11:53 AMsomeguy123Re: If x>2
sorry the xsquared - 4 is supposed to be directly under i dont know what happened so xsquared-x-6/xsquared-4

- December 5th 2012, 12:03 PMLinkRe: If x>2
Yes and there is something after "=" ?

- December 5th 2012, 12:06 PMsomeguy123Re: If x>2
no thats whats supposed to be figured out

- December 5th 2012, 12:11 PMLinkRe: If x>2
well notice that x²-4=(x-2)(x+2), from here come the idea that 2 or -2 is a zero of x²-x-6. In fact -2 is a zero, so x²-x-6=(x+2).Q(x), and Q(x) is some polynomial, after computation q(x)=x-3.

So the answer is (x-3)/(x-2) - December 5th 2012, 04:49 PMtopsquarkRe: If x>2
@someguy123: Be sure you understand why we have to have x > 2. (Actually x can be anything but 2, but let's stick to the original.)

-Dan