dyminjohnson1 dyminjohnson1

23-02-2018
Mathematics

contestada

What are the coordinates of the vertex for f(x) = x2 + 6x + 13?

A. (4, 4)
B. (−4, 4)
C. (3, 4)
D. (−3, 4)

Which of the following is a factor of 5x3 + 320?
A. 5
B. x+4
C. x^2-4x+16
D. All of the above

Respuesta :

budwilkins budwilkins

24-02-2018

x2 + 6x + 13
c = (b/2)2 = (6/2)2 = 9
x2 + 6x + 9 + 4
(x+3)2 +4
so the vertex is at: (-3, 4), D)

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