how do I expand this equation y=x^2-6x+8

Question

how do I expand this equation y=x^​2-6x+8

anonymous · Answer

(x-2)(x-4)

karatechopper · Answer

If we factor it out. 
then you would start by making two sets of parenthesis.
 
y= (                  ) (                    )

So, to start out, lets put x^2 into the parenthesis. For better understanding, we know that, x^2= x multiplied by x
so we can put an x in both of the parenthesis.

y= ( x                 ) ( x                  )

Great! Now that we have taken care of the x's we can now focus on the two factors that multiply to equal 8. And add to become -6.
 Lets start that by listing the factors of 8:
1,8; 2,4; -1,-8 ; -2,-4
We only have 4 pairs that multiply to become 8. Only one pair of those 4 can add to become -6. Lets see which one.

1+8=9
2+4=6
-1+ (-8)= -9
-2 + (-4)= -6
Looks like only the -2 and -4 will work.
Lets insert that into the parenthesis now!
y= ( x -2 ) ( x-4 )
Now we have factored! If that was what you meant by "expanding"

anonymous · Answer

yh same thing ha! ??

karatechopper · Answer

But I showed my work, didn't give the answer.