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4.04 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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Outcomes

II.N.CN.7

Solve quadratic equations with real coefficients that have complex solutions

II.A.CED.1

Create equations and inequalities in one variable and use them to solve problems.

II.A.REI.4

Solve quadratic equations in one variable.

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