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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$4x26x+7=0.

Easy
1min

Which of the following equations does not have any real solutions?

Easy
1min
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