## Intermediate Algebra for College Students (7th Edition)

Makes sense. In order to complete the square, you need to get the square of half the value of the coefficient of the x-term, which is $(\frac{10}{2})^2$. Thus, you need to add $25$ on both sides to complete the square.
Makes sense. In order to complete the square, you need to get the square of half the value of the coefficient of the x-term, which is $(\frac{10}{2})^2$. Thus, you need to add $25$ on both sides to complete the square.