### Home > CCA2 > Chapter 4 > Lesson 4.1.4 > Problem4-54

4-54.

Given the parabola $y=x^2−8x+10$, complete parts (a) through (c) below.

1. Find the vertex by averaging the $x$-intercepts.

$(4,−6)$

2. Find the vertex by completing the square.

You will need $+16$ on the right side of the equation to complete the square.

3. Find the vertex of $y=x^2−3x$ using your method of choice.

Use one of the methods from part (a) or part (b).