Anet and four figures are shown: a net is shown on top. the net consists of 6 identical squares. there are 4 squares in a row, and the first square has one square above it and one below it. there are four solid figures below the net. the figure labeled 1 is a square pyramid, the figure labeled 2 is a cube, the figure labeled 3 is a rectangular prism, and the figure labeled 4 is a pyramid with a pentagonal base. which figure can be formed from the net? (input the number only.)

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.

irrational, cannot