Complex Numbers And Quadratic Equations

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. The value of

i^{4}

is .
2. A complex number z is purely iff Re (z) = 0.
3. The set of all complex number is denoted by .
4. Any equation containing a varibale of highest degree 2 is known as equation.
5. The values of variable satisfying a given equation are called its .
6.

D = b^{2} - 4 a c

is called the of the quadratic equation,

a x^{2} + b x + c = 0

.
Consider a quadratic equation

a x^{2} + b x + c = 0

: (Q7 -Q9)
7. If D = 0, then the equation has roots.
8. If D > 0 but it is not a perfect square, then roots are and unequal.
9. If D < 0, then roots are .
10. roots of an equation with real coefficients always occur in pairs.

Complex Numbers And Quadratic Equations

Gap-fill exercise