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Factorise: 1 - 3x - 3y - 4(X + Y)2 - Mathematics

Sum

factorise: 1 - 3x - 3y - 4(x + y)2 

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Solution

1 - 3x - 3y - 4(x + y)2 

= 1 - 3(x + y) - 4(x + y)2

= 1 - 4(x + y) + (x + y) - 4(x + y)2 

= 1[1 - 4(x + y)] + (x + y)[1 - 4(x + y)]

= [1 - 4x - 4y](1 + x + y)

Concept: Factorisation by Grouping
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 13 Factorisation
Exercise 13 (F) | Q 5.5 | Page 163
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