how to solve this problem by completing the square

Question

x²+2x+__

Answer 1

Hello Britt, 

x^2+ bx

 

What you need to do to complete the square is take the value of b,

divided by two, then square this answer.  The answer that you get is the c value.  Next add c to the above expression. So, we get x^2+bx+c.

 

The problem that we have is

 

x^2+2x, where b= 2 

Then=2/2= 1. (1)^2= 1. This is the c value. 

So, this expression becomes

x^2+2x+1

(X+1) (x+1)

(x+1)^2

Note is this was an equation, then you must also add c to both sides of the equation.

 

I hope this helps and thanks for posting your question.

 

D.Y. T.

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