Factorise : X2 - (A - 3)X - 3a - Mathematics

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Sum

Factorise : x2 - (a - 3)x - 3a

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Solution

x2 - (a - 3)x - 3a

= x2 - ax + 3x - 3a

= x (x - a) + 3 (x - a)

= (x - a) (x + 3)

Concept: Factorisation by Grouping
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (B) | Q 11 | Page 158
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