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Question

Factorise: 10(3x+1x)2(3x+1x)3

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Solution

Given: 10(3x+1x)2(3x+1x)3

Replace 3x+1x=a,

10a2a3

10a26a+5a3 [Using Middle Term Splitting]

2a(5a3)+1(5a3)

(2a+1)(5a3)

(2(3x+1x)+1)(5(3x+1x)3)

(6x+2x+1)(15x+5x3)

Hence, 10(3x+1x)2(3x+1x)3=(6x+2x+1)(15x+5x3)


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