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Factorisation of Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsFactorisation of Polynomials2 Marks
Question
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(a - 2b - 3c)2
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Answer

(a - 2b - 3c)2 = [a + (-2b) + (-3c)]2
=(a)2+ (-2b)2 + (-3c)2 + 2(a)(-2b) + 2(-2b)(-3c) + 2(a)(-3c)
=a2 + 4b2 + 9c2 - 4ab + 12bc - 6ac

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