Question

Math help?

`x^2-10x+c`

Answer 1

`x = -5+-sqrt(25-c)`

Explanation:

Completing the square , we have

`x^2+10x+c = 0`

`=> x^2+10x = -c`

`=> x^2+10x + 25 = 25-c`

`=> (x+5)^2 = 25-c`

`=> x+5 = +-sqrt(25-c)`

`:. x = -5+-sqrt(25-c)`