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Algebraic Expressions and Identities — Maths STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8MathsAlgebraic Expressions and Identities2 Marks
Question
Multiply:
$(a-1) by $\left(0.1 a^2+3\right)$
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Answer

To multiply, we will use distributive law as follows:
$(a-1) \text { by }\left(0.1 a^2+3\right)$
$=0.1 a^2(a-1)+3(a-1)$
$=0.1 a^3-0.1 a^2+3 a-3$
Thus, the answer is $0.1 a^3-0.1 a^2+3 a-3$

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