Question

Factorise a^3-2a^2+1. ​

Answer 1

when we will put a=1 then term will 0
mean...... (a-1)
is a factor of (a^3-2a^2+1. ​) this.

after it

=$(a^3-2a^2+1)/(a-1)$
=$(a^2-1)$
=$(a+1)(a-1)$ by using the {a²-b²} property.

so factor will
=$(a-1)(a+1)(a-1)$

hope it helps you..
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