Zeros are found by factoring. You should probably by now recognize that this will factor into a perfect square binomial, since the x is squared and the 25 is also a perfect square. Of course this only works when the second sign is a +. Which ours is. I mean "+25". Factor it to the square root of x^2 - the square root of 25: (x-5)(x-5), or [tex](x-5) ^{2} [/tex], same thing, different notation.
