GCSE Secondary Maths Age 13-17 - Algebra: Quadratic Equation Formula - Explained

The video tutorial explains how to solve a quadratic equation using the quadratic formula. It begins with the problem statement and emphasizes the importance of writing the formula correctly to avoid losing marks. The instructor demonstrates substituting values into the formula and simplifying the expression. The solutions are calculated and rounded to two decimal places. The video concludes with a discussion on mark allocation and a reminder to show all steps in the working out process.

What is the first step in solving a quadratic equation using the quadratic formula?

• Graphing the equation

• Writing down the quadratic formula correctly

• Guessing the roots

• Using a calculator directly

In the quadratic formula, what does the 'b' represent?

• The coefficient of x^2

• The square root term

• The coefficient of x

• The constant term

What is the value under the square root in the quadratic formula called?

• Root

• Discriminant

• Coefficient

• Constant

What are the two possible solutions for a quadratic equation when using the quadratic formula?

• Only positive root

• Only negative root

• No roots

• Both positive and negative roots

How many marks are allocated for correctly substituting values into the quadratic formula?

• One mark

• Two marks

• No marks

• Three marks