Serious Help with a low iq math problem

[racoon4]

I'm too dumb to figure this shit out (again) . The graph of the function f (x) = a (x - 3) (x + k), where a and k are real numbers, is a parabola whose point T (5, -32) is the vertex. What is the value of the number k? A: -13, B: -7, C: 7 or D: 13? Help brocels

 

[racoon4]

The solution is B: -7 btw

 

[trying to ascend]

a(x² - 3x + kx - 3k). X of the vertex = -b/2a, therefore (-k + 3/2) times a = 5. therefore -ka + 3a/2a = 5.


-ka + 3a = 10a.

-ka = 7a

-k = 7.

k = -7

 

[NoLooksNoLife]

The solution is B: -7 btw

 

[racoon4]

View attachment 614276

thank you very much, brocel

 

[trying to ascend]

thank you very much, brocel

Aren't you Indian? If so, then are you trying to crack the JEE?

 

[CroatianManlet]

I have no idea jfl i quit high school my fourth year

 

[Oroborus]

View attachment 614276

a(x² - 3x + kx - 3k). X of the vertex = -b/2a, therefore (-k + 3/2) times a = 5. therefore -ka + 3a/2a = 5.


-ka + 3a = 10a.

-ka = 7a

-k = 7.

k = -7

Iq mogger

 

[racoon4]

Aren't you Indian? If so, then are you trying to crack the JEE?

I'm not a curry, no. I'm a south slav