**Q4: **

Factorise fully .

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- C
- D
- E

**Q5: **

Find the solution set of in .

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**Q6: **

Factorise fully .

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- E

**Q7: **

If , what is the value of ?

**Q8: **

If and , what is the value of ?

**Q9: **

If and , what is the value of ?

**Q10: **

Factorise fully .

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- E

**Q11: **

Factorise fully .

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- E

**Q12: **

Factorise fully .

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**Q13: **

By factorising or otherwise, evaluate .

**Q14: **

If , what is the value of ?

**Q15: **

Factorise fully .

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**Q16: **

By considering the difference of two squares, evaluate without a calculator.

**Q17: **

If , , and , what is the value of ?

**Q18: **

Factorise fully .

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**Q19: **

If , what is the value of ?

- A4
- B5
- C25
- D1

**Q20: **

By considering the difference of two squares, find the value of for which .

**Q21: **

Factorise fully .

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**Q22: **

Factorise fully .

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- E

**Q23: **

Factorise fully and evaluate .

**Q24: **

Factorise fully .

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**Q25: **

Factorise fully .

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- D
- E