3x2 -6x - 4 =0 how to complete the square?
We have the quadratic
First of all, we take out a factor of 3. Don't take it out from the constant however as it can lead to some unnecessary fraction work.
Now we write out our initial bracket. To do this we have
Once we have our initial bracket, we subtract the square of
Now we must remove the square brackets by multiplying whats in it by the factor on the outside, in this case