quadratic equation
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Q1           Score:  7.14
  a>0
  a<0
  a≠0
 a≠0,b≠0
Q2           Score:  7.14
 4-
 3-
 5-
 zero
Q3           Score:  7.14
 2
 1
 2-
 1/2
Q4           Score:  7.14
 3
 4
 3- , 4-
 3 , 4
Q5           Score:  7.14
 2 , 3
 2- , 3
 6 , 1
 1- , 6
Q6           Score:  7.14
 first
 second
 third
 fourth
Q7           Score:  7.14
 0 , 2
 0 , 3-
 2 , 3-
 2- , 3
Q8           Score:  7.14
 1-
 2-
 2
 1
Q9           Score:  7.14
  2-
  2
  10
  14
Q10           Score:  7.14
  m=-3
 m is an even number
  e (1 - m) is a perfect square
  a , c are both right
Q11           Score:  7.14
 3
 3-
 9
 zero
Q12           Score:  7.14
 3 , 4
 2 , 6
 3 , 4-
 2 , 6-
Q13           Score:  7.14
 2 , 1
 1- , 2-
 1- , 2
 1 , 2-
Q14           Score:  7.14
  2√+1- , 2√-1-
 2√+1 , 2√-1
 1 , 2√
 1- , 2√-


   



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