Write an expression that represents the sum of a number x and 11

x + 11

Step-by-step explanation:

Expressions don't have equal signs in them like equations do, so all we are asked to do is to write in numbers and variables what the words translate to mathematically.  There is nothing to solve because of the lack of the equals sign.  The word "sum" means the answer you get to something when you add, so we know we are adding.  We are adding an unknown x to 11, so the expression mathematically looks like this:

x + 11

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.