2. Complex Numbers & Quadratics
2.07 The discriminant and the quadratic formula
Interactive practice questions
Below is the result after using the quadratic formula to solve an equation.
$x=\frac{10\pm\sqrt{-1}}{8}$x=10±√−18
The equation has two real solutions.
A
The equation has one real solution.
B
The equation has no real solution.
C
Easy
< 1min
Consider the equation $x^2+6x+9=0$x2+6x+9=0.
Easy
1min
Consider the equation $4x^2-6x+7=0$4x2−6x+7=0.
Easy
1min
Which of the following equations does not have any real solutions?
Easy
1min
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