Factor Completely.
$$x ^{2}-3xy+9y ^{2}$$

Sorry, this is one of the weaker areas of this subject for me.

Question

Factor Completely.
$$x ^{2}-3xy+9y ^{2}$$

Sorry, this is one of the weaker areas of this subject for me.

mertsj · Answer

Could you factor it if it said x^2-3x+9   ?

anonymous · Answer

Use the formula $$(a-b)^2 = a^2 - 2ab + b^2$$

anonymous · Answer

Could you guess what a and b values are from the above?

mertsj · Answer

Actually it is prime because there are no factors of 9 whose sum is -3

anonymous · Answer

factoring is hard for me.  I can multiply it all day long but changing it to the other way is hard.  and no @Bad2zBone

anonymous · Answer

ok.  Thank you @Mertsj   This one was quite a bit harder than the others and I guess that is why.  lol

mertsj · Answer

yw

anonymous · Answer

That is true actually, that should be a 6 not a 3 in the middle