Easy, answer this simple question : ) *what kind of angles are 2 and 3?

∠2   =  ∠3 is a pair of  Vertical Angles.

Step-by-step explanation:

Whenever two lines intersect with each other, the angle formed between them is called Vertically Opposite Angle.

Here, line l intersects the traversal so,

the angle formed between them  ∠1 and ∠4 are vertically opposite.

So, ∠1 =  ∠4

Also, as ∠1 +  ∠3 =  ∠2  + ∠4 = 180°  (LINEAR PAIRS)

So,  ∠3   =  ∠2 are also vertical angles.

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.

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