Consider the sets below.
Axxis a polygon
B xx is a triangle
Which is true?
O ACB
О В СА
O A=B
OBC=A

The correct answer is option B. i.e. B is a subset of A. Given the set A is {x|x is a polygon} and the set B is {x|x is a triangle}. Then the set B is a subset of set A, because a triangle is a polygon and all triangles are included in the set of polygons. hopes this helps

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.