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Factorisation of Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsFactorisation of Polynomials2 Marks
Question
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(-3a + 4b - 5c)2
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Answer

(-3a + 4b - 5c)2 = [(-3a) + (4b) + (-5c)]2
= (-3a)2 + (4b)2 + (-5c)2 + 2(-3a)(4b) + 2(4b)(-5c) + 2(-3a)(-5c)
=9a2 + 16b2 + 25c2 - 24ab - 40bc + 30ac

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