Gujarat BoardEnglish MediumSTD 8MATHSFactorisation1 Mark
Question
Factorise the expression $2 a^3-3 a^2 b+5 a b^2-a b$.
✓
Answer
We have, $2 a^3-3 a^2 b+5 a b^2-a b$ In this expression, only variable $a$ is common. $ \begin{aligned} \Rightarrow 2 \times a & \times a \times a-3 \times a \times a \times b+5 \times a \times b \times b-a \times b \\ & =a(2 \times a \times a-3 \times a \times b+5 \times b \times b-b) \\ & =a\left(2 a^2-3 a b+5 b^2-b\right) \end{aligned} $
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