How to calculate quadratic expression

To calculate a quadratic expression, you will need to follow these steps:

1. Write down the quadratic expression in the form ax^2 + bx + c, where a, b and c are coefficients of the quadratic equation.
2. Substitute the values of a, b, and c into the quadratic expression.
3. Simplify the expression using the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).
4. If necessary, simplify the expression further by combining like terms.
5. Additionally, you can solve the quadratic expression by factoring, completing the square, or using the quadratic formula.

For example, let's say we have the quadratic expression 2x^2 + 5x - 3:

1. We have a = 2, b = 5, and c = -3.
2. Substitute the values into the expression: 2x^2 + 5x - 3.
3. Simplify: 2x^2 + 5x - 3.
4. The expression is already simplified and cannot be factored further.
5. If you want to solve the quadratic equation, you can use the quadratic formula to find the roots of the equation, which will be x = (-b ± √(b^2 - 4ac)) / 2a.