9/x^2-7x+12

x=-3

Question

9/x^2-7x+12 

x=-3

anonymous · Answer

plug in the x = -3 into the equation for all the x variables

anonymous · Answer

i have no idea how to do this, can you help withthis one

anonymous · Answer

|dw:1362444068372:dw|

anonymous · Answer

so the answer would be 34 rightz?

anonymous · Answer

i see what you did there. thanks

anonymous · Answer

do i add them?

anonymous · Answer

@Ceann

anonymous · Answer

if you say x = -3 then you plug it into the equation where the x variables are.. 
if ur trying to solve for x or something weird then no..

anonymous · Answer

evaluate expression for the given value of the variable

anonymous · Answer

actually the 9 is above everything in the problem

anonymous · Answer

its 9  /  x^2-7x+12  

x=-3

anonymous · Answer

Sorry about that...let's give this another go. For future reference, you can make the form of the question clearer by either using the equation tool or using parentheses to indicate fractions. I'll have it reworked shortly

anonymous · Answer

Thanks

anonymous · Answer

Starting with form
$$\frac{9}{x^2-7x+12}$$
We start by factoring the denominator into its two "roots:"
$$\frac{9}{(x-3)(x-4)}$$
and then substituting our x identity, x= -3, for all instances of x:
$$\frac{9}{(-6)(-7)}$$
Simplify the bottom, divide out the top:
$$\frac{9}{42}=\frac{3}{14}$$
and there's your final answer. Up to you if you want to simplify it or not.

anonymous · Answer

how would i simplify that?

anonymous · Answer

Simplify as in divide out into a decimal. That's the simplest fraction form you can get.

anonymous · Answer

thanks can i post another?

anonymous · Answer

go right ahead