How do you answer this question?

3x - 2 - x - 3 ?

There is no way to actually solve the problem, because it is an expression (no equal sign). But what you can do it simplify the expression. Just add together the like terms, like 3x and -x, and -2 and -3. Doing this, you will get 2x-5.

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.