SOLUTION: {{{X^2-6x=16}}} I'm supposed to solve this by completing the square.

Question 19274: I'm supposed to solve this by completing the square.
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
right, fairly easy concept here. As follows:

Just look at the left hand side: . We need to figure out which number to add/subtract such that we can then factorise it as or

so, expanded would give and the negative version would have -2ax instead.

So, we have -6x which is the (-2ax) which means that a needs to be 3.

So, the term is ---> 9

So, we have to add 9...to both sides remember, to keep the equation unaltered...
So, can be written instantly as --> the negative version, since the x-term was negative.

and we have
OR

--> x-3 = +5 OR x-3 = -5
--> x = 8 OR x = -2

jon.

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