Quadratic Equations

The solutions of the quadratic equation
x²-5x+6=0 are

• x=1 or x=-6
• x=3 or x=2
• x=-3 or x= 2
• x=-1 or x=6

In the quadratic formula, if b²-4ac>0, then the quadratic equation has

• two imaginary solutions
• two different real solutions
• two equal real solutions
• none of these

To complete the perfect square trinomial in the expression x²-22x+_____, we need to add

• 11
• 44
• 121
• 144

In the quadratic formula, the expression
b²-4ac is called

• discrim
• determinant
• discriminant
• none of these

In the expression 4x²-5x+9 the leading coefficient is

• 9
• -5
• -4
• 4

The solution of the quadratic equation
4x²-5x-9=0 are

• x=-1 or x=9/4
• x=1 or x=9/4
• x=2 or x=3
• x=-2 or x=-3

If 3+2i is a solution of a quadratic equation, then other solution of this quadratic equation is

• 2-3i
• 3+2i
• 1/3 -1/2i
• 3-2i

One solution of the quadratic equation
x²-7x+12=0 is

• x=3
• x=2
• x=-3
• x=-2

Fill the blank space to complete the perfect square trinomial
x²-18x+____=(x- ____)²

• 9 and 3 respectively
• 81 and 9 respectively
• -9 and -3 respectively
• -81 and -9 respectively

Which of the followig trinomial is perfect square trinomial?

• x²+4x+9
• x²-22x-121
• x²+4x-9
• x²-22x+121