What is the distance between A and B?​

20

Step-by-step explanation:

-7-5=-12

-4-12=-16

AB^2=(-12)^2+(-16)^2

AB^2=144+256

Ab=

Ab=20

step-by-step explanation:

i am not sure sorry : c

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.