Which statements about the graph of the function f(x) = -x2 - 4x + 2 are true? Select three options. The domain is {x\x 5-2}
The range is yly 56}
The function is increasing over the interval (-2)
The function is decreasing over the interval (-4).
The function has a positive y-intercept.

answer is : muchas/tipicas

have a nice day!

~recklesschicken

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.