Set 2: Quadratic Equations (Advanced)

Choice A is correct. Choice A is the correct answer. 1. Check first term: $x^2$. 2. Check last term: $25= (-5)^2$. 3. Check middle term: $2(x)(-5) = -10 x$. This is a perfect square trinomial matching $(a-b)^2$. Thus, $(x - 5)^2$. Choice B is incorrect because the middle term would be positive. Choice C is incorrect because this is a difference of squares ($x^2 - 25$). Choice D is incorrect because the constant would be 100.