Complete this item. Do not multiply factors (i. e. (a - b)(a + 2b)). Simplify:
2y2 - 7y -15 9y2 - 1 y2 + 3y-10
3y2 - 8y-3 472-92y2 - 9y+ 9

10 you would take 50/ .2

step-by-step explanation:

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.