2 Answers

Solarissf · Answer 1 · 2019-02-17T19:33:20+0000

Complete the square by using the following form:

(x+(b)/(2))^2 = x^2 +bx+((b)/(2))^2

$y = (x^2 -6x) +16 \\ \\ y = (x^2 -6x+9) + 16 - 9 \\ \\ y = (x-3)^2 + 7$

The vertex is at (3,7)
The squared term is positive so it opens up and vertex is a minimum.

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