Using the completing-the-square method, rewrite f(x) = x+ 10x + 7 in vertex fom Ofx) = (x + 5) 18
O f(x) = (x+ 10)2+25
O fx) = (x+ 5)2+7
O f(x) = (x+ 5

answer: 590

step-by-step explanation:

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21

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.