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

The video tutorial explains how to solve a quadratic equation using the quadratic formula. It begins with an introduction to the formula and its application. Allison demonstrates substituting values into the formula to find the solutions. The video then guides viewers through deriving the values of A, B, and C, and finalizing the equation in standard form. It concludes with a discussion on marks allocation and the importance of understanding the question requirements.

What is the general form of a quadratic equation?

• ax + b = 0

• ax^2 + bx + c = 0

• ax^3 + bx^2 + cx + d = 0

• ax^2 + bx = 0

In the quadratic formula, what does the term 'b^2 - 4ac' represent?

• The coefficient of x

• The product of roots

• The discriminant

• The sum of roots

If 2A equals 4 in the quadratic equation, what is the value of A?

• 4

• 2

• 1

• 3

What is the value of C if 8C equals 32?

• 4

• 5

• 3

• 2

How many marks are allocated for correctly identifying the values of A, B, and C?

• 1 mark

• 2 marks

• 4 marks

• 3 marks