Which line show the first error in the solution? 3(x−2)=18 (1)

3x−6=18 (2)

3x−6+6=18+6 (3)

3x=24 (4)

x=21 (5)

Line 2

Line 4

Line 5

Line 3

Line 3

Step-by-step explanation:

Proper solution step-by-step:

1. 3(x-2)=18

2. 3x - 6 = 18

3. 3x = 18 + 6

4. 3x = 24

5. x = 8

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.