Q3 of 53 Page 77

Factorise:

p2 – 24p + 144

using (x–y)2 = x2–2xy + y2

= p2–2 × p × 12 + 122


= (p–12)2


= (p–12)(p–12)


More from this chapter

All 53 →
3

Factorise:

a2 – 10a + 25

 3

Factorise:

2x2–24x + 72

 3

Factorise:

x3 – 12x2 + 36x

 1

4a + 12b is equal to