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Factorisation of Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsFactorisation of Polynomials2 Marks
Question
Factorise:
2x2 + 11x - 21
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Answer

2x2 + 11x - 21
= 2x2 + 14x - 3x - 21
= 2x(x + 7) - 3(x + 7)
= (x + 7)(2x - 3)

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