Select all of the following that are quadratic equations. x2 + 3 x -5 = 0
x2 - x = 3 x + 7
5 x - 7 = 0
7 x2 + 14 x = 0
x3 - 3 x2 + 1 = 0
x - 5 = 9 x + 7

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.

the k side

step-by-step explanation:

plese mark mde brainliest!

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step-by-step explanation: