Question

If using the method of completing the square to solve the quadratic equationx2 + 2x + 30 = 0, which number would have to be added to "complete thesquare"?

Answer 1

For this case we have the following equation:

`x^2+2x+30=0`

We can complete the square with the following:

`x^2+2x+((2)/(2))^2+30-((2)/(2))^2=0`

And solving we got:

`x^2+2x+1+30-1=0`

Then the answer for this case should be:

1