I need to complete the square for this formula: -0.5x^{2}- 0.25x + 25

I can do this easily, the answer is:

-0.5(x+0.25)^{2}+ 25.03

However I need to get the answer in a different format. When applying this equation on the complete the square function on symbolab, the answer is:

-(0.707107x+0.176777)^{2}+25.0313

This is the answer I need however I have no idea how to get to this answer. Any help is appreciated.