|| Quadratic equations ||

Quadratic equations in one unknown

Exercises

For each question, click on the box corresponding to your answer, and then click on the 'Submit Answer' button.

1- Find the roots of the following equation: 3x2 - 12x - 15 = 0
x = 1 and x = -5 x = -1 and x = 5 There is no solution.
     


2- Find the roots of the following equation: x2 - 4x + 15 = 0
There is no solution. x = 5 and x = 3 x = 1 and x = 15


3- Find the roots of the following equation: 7x2 - 12x + 11 = 5x2 - 5
x = 4 and x = 2 x = 1 and x = -1 It is impossible to solve this equation.
     


4- Find the roots of the following equation: 3x2 - 7 = 0
x = ± 1.5275 This is not a quadratic
equation.
     


5- Find the roots of the following equation:
This is not a quadratic equation. Thus, one can not find the roots using the general method.
x = 4 and
x = 0
The cat's got my tongue.
          


|| Quadratic equations ||