+0  
 
0
452
3
avatar+124 

I will not be posting again on this page, because before another guest faked being me, so even if I say nevermind, I am going to post, IT IS NOT ME-- unless it's heartSTORM. So here's my problem:

 

What real value of $t$ produces the smallest value of the quadratic $t^2 -9t - 36$?

 

Thank you SO SO SO much!!!

 Dec 6, 2020
 #1
avatar
0

Maxmimal value of ax^2 + bx + c is when x = -b/a

 

t^2 - 9t - 36 = 0

max t = 9/1 = 9

quadratic is maximized when t = 9

 Dec 6, 2020
 #2
avatar
0

that's incorrect... sorry

 Dec 6, 2020
 #3
avatar
0

t^2 - 9t -36    is a bowl shaped parabola

   min will occur at   t = - b/2a    =    -  -9/2   = 4.5

 Dec 6, 2020

2 Online Users

avatar