Question

Solve by completing square method x2-8x+18

Answer 1

Answer:

Step-by-step explanation:

No Solution

Explanation:

To complete the square, we need the perfect square of the equation of x2+8x+18 In order to find the perfect square, we need to change the equation into (x−b)2=a, were a and b are constants. To find c, we divide the coefficient by 2 and square it

(8/2)2=16   HERE ( 2 is square not number)

We get 16, which means that we must change our current equation to have a 16.

x2+8x+18−2=−2

By subtracting 2 from both sides, we get that 16. Now, we can simplify the left hand side into the perfect square

x2+8x+16=(x+4)2     HERE ( 2 is square not number)

This means (x+4)2=−2   HERE ( 2 is square not number)

We now square root both side, giving us x+4=√−2

They can never be a negative square root, so therefore there is no answer.