Question

What is the x value of the vertex of f(x) = 2x^2 - 4x + 9

Answer 1

(1, 7)

Explanation:

a = 2, b = -4, c = 9

x = -b/2a

x = 4/2(2)

x = 1

plug 1 in for 'x' into 2x² - 4x + 9 to get the y-value

2(1) - 4(1) + 9

2 - 4 + 9 = 7