I'm not good at functions

When x is equal to 1, y is equal to 18-2(1), which is equal to 16.

When x is equal to 2, y is equal to 18-2(2), which is equal to 14.

When x is equal to 4, y is equal to 18-2(4), which is equal to 10.

When x is equal to 5, y is equal to 18-2(5), which is equal to 8.

Let me know if 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.

step-by-step explanation:

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