Q3 of 53 Page 73

Factorise:

4a2 – 25

Using the identity,

x2–y2 = (x + y)(x–y)


so, (2a)2–(5)2


= (2a–5)(2a + 5)


More from this chapter

All 53 →
2

Factorise:

3xy – 6zy – 3xt + 6zt

 2

Factorise:

y3 – 3y2 + 2y – 6 – xy + 3x

 3

Factorise:

3

Factorise:

x4 – y4