How do you complete the square to solve #-x^2-2x+3= 0#?
If you have to solve the equation you can multiply all by -1:
It's always more simple to work with positive numbers =)
So we can write our equation adding (or subtracting) what is missing to obtain a perfect square:
If you want to solve the equation you have to obtain 4 in the square
A perfect square trinomial is in the form
Multiply the equation times
The left side of the equation can be made into a perfect square trinomial by completing the square. This will enable the equation to be solved for
Divide the coefficient of the
There is now a perfect square trinomial on the left side of the equation.
Take the square root of both sides.