Short-Question

# What does the discriminant tell us in algebra?

## What does the discriminant tell us in algebra?

The discriminant tells you how many solutions there are to quadratic equation or how many x intercepts there are for a parabola. If the discriminant is less than zero, there are no solutions and if the discriminant is equal to zero, there is one solution.

### What does the discriminant of a quadratic function tell us about its graph?

The discriminant gives us important information about the quadratic equation. First, it can tell us how many solutions the quadratic equation has. It can also tell us how many times the graph crosses the x-axis and if the solutions are real or complex. But the discriminant is just a number!

#### What is the discriminant value used for?

In a quadratic equation, the discriminant helps tell you the number of real solutions to a quadratic equation. The expression used to find the discriminant is the expression located under the radical in the quadratic formula!

Why is the quadratic equation useful?

So why are quadratic functions important? Quadratic functions hold a unique position in the school curriculum. They are functions whose values can be easily calculated from input values, so they are a slight advance on linear functions and provide a significant move away from attachment to straight lines.

How is the concept of the discriminant of a quadratic equation used in solving real life problems?

## How does the discriminant affect the graph?

The discriminant shows you the type and number of solutions of the graph. If b2 – 4ac > 0, the graph has two real solutions. If b2 – 4ac = 0, the graph has one real solution. If b2 – 4ac < 0, the graph has two imaginary solutions.

### What is the use of the discriminant of quadratic equation?

The discriminant is the part of the quadratic formula underneath the square root symbol: b²-4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

#### How are quadratic functions used in real life?

Throwing a ball, shooting a cannon, diving from a platform and hitting a golf ball are all examples of situations that can be modeled by quadratic functions. In many of these situations you will want to know the highest or lowest point of the parabola, which is known as the vertex.

What is the use of quadratic function?

Quadratic functions are used in many types of real-world situations. They are useful in describing the trajectory of a ball, determining the height of a thrown object and in optimizing profit for businesses.

What are the steps to solve the quadratic function?

Now we can solve a Quadratic Equation in 5 steps: Step 1 Divide all terms by a (the coefficient of x 2). Step 2 Move the number term (c/a) to the right side of the equation. Step 3 Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.

## What is the determinant of a quadratic function?

The standard form of a quadratic equation is: ax 2 + bx + c = 0, where a, b and c are real numbers and a ≠ 0. The term b 2-4ac is known as the determinant of a quadratic equation.

### What does the discriminant tell you?

The discriminant is the part of the quadratic formula underneath the square root symbol: b²-4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

#### What does discriminant mean in math?

Discriminant, in mathematics, a parameter of an object or system calculated as an aid to its classification or solution. In the case of a quadratic equation ax2 + bx + c = 0, the discriminant is b2 − 4 ac; for a cubic equation x3 + ax2 + bx + c = 0, the discriminant is a2b2 + 18 abc − 4 b3 − 4 a3c − 27 c2.