Jane is going to fence her back yard. she has purchased 150 feet of fencing and knows that she wants to fence in a rectangular area where one side will be the back of her house. she knows her house is 40 feet across the back. which of the following is the equation that jane cane use to figure out how far back from the house she can fence in

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.

answer: 800

step-by-step explanation: