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Mathematics 16 Online
zarkam21:

Help

zarkam21:

1 attachment
Vocaloid:

for part I it is asking for the y-intercept so simply set x = 0 and solve for y

zarkam21:

y=-14

Vocaloid:

awesome for part B, identify the a, b, and c values of the function then find x = -b/(2a)

zarkam21:

a=1 b=-5 c=-14

Vocaloid:

awesome, then x = -b/(2a) = ?

zarkam21:

5/2

Vocaloid:

good, so that's the x-coordinate of the vertex to find the y-coordinate plug x = (5/2) into the function y = x^2 - 5x - 14

zarkam21:

y=-81/4

Vocaloid:

awesome for part C simply factor y = x^2 - 5x - 14

zarkam21:

y=(x-7)(x+2)

Vocaloid:

good, so the x-intercepts are 7 and -2 in (x,y) form these are (7,0) and (-2,0) that's it for part c

zarkam21:

okay thanks

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