Factorise :
3a2 - 5a + 2
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= 3a2 - (3 + 2)a + 2
= 3a2 - 3a - 2a + 2
= (3a2 - 3a) - (2a - 2)
= 3a(a - 1) - 2(a - 1)
= (a - 1)(3a - 2)
Hence,3a2 - 5a + 2 = (a - 1)(3a - 2)
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