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Q3 of 53 Page 73

Factorise:
x⁴ – y⁴

Using the identity,

x²–y² = (x + y)(x–y)

so, (x²)²–(y²)²

= (x²–y²)(x² + y²)

= (x–y)(x + y)(x² + y²)

More from this chapter

3

Factorise:

4a² – 25

3

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3

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(0.7)² – (0.3)²

Questions · 53

4. Factorisation

1 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 2 3 3 3 3 3 3 3 4 4 4 4 4 5 5 5 5 6

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