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Quadratic Patterns and Equations

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Quadratic Patterns and Equations

Quadratic Patterns and Equations

Parabola graph illustration

📊 Part 1: Identifying Quadratic Patterns

1. Look at this sequence: 1, 4, 9, 16, 25, ...

a) What is the next term? ________

b) What is the rule for the nth term? ________________

2. Complete this table for the quadratic pattern:

Term number (n): 1, 2, 3, 4, 5

Term value: 3, 12, 27, 48, ____

The rule is: n² × ____ = ________

3. Circle the sequences that are quadratic:

2, 8, 18, 32, 50, ...

5, 10, 15, 20, 25, ...

1, 8, 27, 64, 125, ...

4, 16, 36, 64, 100, ...

🔧 Part 2: Solving Quadratic Equations by Factorisation

4. Use the zero product property to solve: (x - 3)(x + 2) = 0

Solutions: x = _______ or x = _______

5. Factorise and solve: x² - 5x + 6 = 0

Factorised form: (x - ____)(x - ____) = 0

Solutions: x = _______ or x = _______

6. Solve by factorising: 2x² - 8x = 0
7. Which equation has solutions x = -1 and x = 4?

(x + 1)(x - 4) = 0

(x - 1)(x + 4) = 0

(x + 1)(x + 4) = 0

(x - 1)(x - 4) = 0

📈 Part 3: Quadratic Graphs and Key Features

8. Draw a sketch of the parabola y = x² - 4x + 3

Mark and label: vertex, x-intercepts, y-intercept, axis of symmetry

9. Match the quadratic equation features with their descriptions:
1. Vertex
2. X-intercepts
3. Y-intercept
4. Axis of symmetry
A. Where the graph crosses the y-axis
B. The turning point of the parabola
C. Vertical line through the vertex
D. Solutions to the equation (roots)
10. For the equation y = (x - 2)(x + 4), identify:

a) X-intercepts: x = _______ and x = _______

b) Axis of symmetry: x = _______

c) Y-intercept: y = _______

d) Does the parabola open upwards or downwards? ________________

🌍 Part 4: Real-World Applications

11. A ball is thrown upwards. Its height h (in metres) after t seconds is given by:

h = -5t² + 20t + 2

a) What is the initial height of the ball? _______ metres

b) When does the ball hit the ground? (Solve -5t² + 20t + 2 = 0)

c) What does the vertex of this parabola represent in real life?

12. A rectangular garden has dimensions where the length is 3 metres more than the width. If the area is 40 square metres, find the dimensions.

Let width = w metres, then length = _______ metres

Area equation: w × (w + 3) = 40

Expanded: w² + 3w - 40 = 0

Width = _______ metres, Length = _______ metres

13. True or False: A quadratic equation can have:

No real solutions

Exactly one solution

Exactly two solutions

More than two solutions

🎯 Part 5: Extension and Reflection

14. Challenge: Write a quadratic equation that has solutions x = -3 and x = 7
15. Reflection: Explain in your own words how the solutions of a quadratic equation relate to its graph.
16. What patterns do you notice in quadratic sequences that help you identify them?

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