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Operations on Algebraic Expressions — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSOperations on Algebraic Expressions2 Marks
Question
Find the following products:
$ \left(x^3-2 x^2+5\right) \times(4 x-1) $
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Answer

$ \left(x^3-2 x^2+5\right) \times(4 x-1) $
$ =\left(x^3-2 x^2+5\right) \times 4 x+1\left(x^3-2 x^2+5\right) \times(-1)$
$ =4 x^4-8 x^3+20 x-x^3+2 x^3-5 $
$ =4 x^4-9 x^3+2 x^2+20 x-5 $

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