Thread: If x>2

Originally Posted by someguy123

If x>2 then x²-x-6 =
x_²-4
can you show with steps please thank you!

Your question is a bit garbled. What's going on in the bottom line? Could you spell it out? (Or you can quickly look at the LaTeX forum.)

-Dan

sorry the xsquared - 4 is supposed to be directly under i dont know what happened so xsquared-x-6/xsquared-4

Yes and there is something after "=" ?

no thats whats supposed to be figured out

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)

@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