Find the value(s) of x if f(x) = 1.
A. 9
C. -1.5
B. 4
D. both a and c

D. both a and c

Step-by-step explanation:

We want to find the x value when the y value is 1

There are two x values when the y value is 1

When x = -1.5  y=1  and when x = 9  y = 1

step-by-step explanation:

this is not a question

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.