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Factorisation of Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsFactorisation of Polynomials2 Marks
Question
Factorise:
5x2 - 16x - 21
✓

Answer

5x2 - 16x - 21
= 5x2 + 5x - 21x - 21
= 5x(x + 1) -21(x + 1)
= (x + 1)(5x - 21)

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