Homework 18:
Due Wednesday 7/23/14
1. Complete the square and find the vertices for each of the following parabolas:
• y = x2 + 8x + 4
• y = x2 − 8x + 4
• y = x2 + 20x − 10
• y = x2 − 14x + 1
2. Put the parabola y = x2 + bx + c in vertex form. (We did this in class.) What is the
vertex of this parabola? [Write it as a point: (x coordinate, y coordinate).]
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