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Quadratic Equations

Mathematics IGCSE Extended ๐Ÿ”“ Free Preview

Question: Solve $x^2 - 5x + 6 = 0$

Step-by-Step Solution:

$$x^2 - 5x + 6 = 0$$

$$(x - 2)(x - 3) = 0$$

$$\boxed{x = 2 \quad \text{or} \quad x = 3}$$

Key Concept: Find two numbers that multiply to give the constant term (6) and add to give the coefficient of x (-5). The numbers are -2 and -3.

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๐Ÿ“ Completing the Square ๐Ÿ“Š Quadratic Formula ๐Ÿ“ Word Problems ๐ŸŽฏ Discriminant Analysis

Motion & Forces

Physics IGCSE Core ๐Ÿ”“ Free Preview

Question: A car accelerates from rest at $2 \text{ m/s}^2$ for 5 seconds. Calculate the distance travelled.

Step-by-Step Solution:

$$s = ut + \frac{1}{2}at^2$$

$$s = 0 \times 5 + \frac{1}{2} \times 2 \times 5^2$$

$$s = 0 + 1 \times 25$$

$$\boxed{s = 25 \text{ m}}$$

Key Concept: Using the SUVAT equation $s = ut + \frac{1}{2}at^2$ for constant acceleration. The initial velocity $u = 0$ because the car starts from rest.

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๐Ÿ“Š Velocity-Time Graphs โšก Force Calculations โšก Energy Problems ๐ŸŽฏ Motion Under Gravity

Acids, Bases & Salts

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๐Ÿงช pH Calculations ๐Ÿงช Neutralization Reactions ๐Ÿงช Salt Preparation ๐Ÿงช Titration Problems ๐Ÿงช Acid-Base Indicators

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