Theory of Quadratic Equations

The value of i is equal to:

• 
  A
• 
  B
• 
  C
• 
  D

In equation ax²+bx+c=0, a and b are:

• Constants A
• Co-efficients B
• Variables C
• Factors D

• 
  A
• 
  B
• 1 C
• -1 D

Reduce form of (img) is equal to:

• 1 A
• 
  B
• 
  C
• 0 D

Sum of the roots of the equation 3x²-5x+7=0:

• 
  A
• 5+3 B
• 
  C
• 5³ D

The discriminant of quadratic equation is:

• 
  A
• b²-4ac B
• -b²+4ac C
• 
  D

• 
  A
• 
  B
• 2 C
• 1 D

Find k, if the roots are equal in (k+3)x²-2(k+1)x-(k+1)=0:

• 2, -1 A
• -2,-1 B
• -2,1 C
• 2,1 D

• 
  A
• 
  B
• 
  C
• 
  D

Reduce form of (img) is:

• 
  A
• 
  B
• 1 C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

Each of the complex cube root of unity is:

• The square of the other A
• The half of the other B
• The cube of the other C
• Equal to each other D

If a = 2, b = -7, c = 1, then the value of b²-4ac is:

• 37 A
• 39 B
• 41 C
• 42 D

• 
  A
• bc B
• 
  C
• 
  D

If b²-4ac > 0 and is not a perfect square, then roots are:

• Rationaland unequal A
• Irrationaland equal B
• Rationaland equal C
• Irrationaland unequal D