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Mathematics

Factorise :

(a + 2b) (3a + b) - (a + b)(a + 2b) + (a + 2b)2

Factorisation

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Answer

(a + 2b) (3a + b) - (a + b)(a + 2b) + (a + 2b)2

= (a + 2b)(\Big((3a + b) - (a + b) + (a + 2b))\Big)

= (a + 2b)(\Big( 3a + b - a - b + a + 2b)\Big)

= (a + 2b) (3a - a + a + b + 2b - b)

= (a + 2b) (3a + 2b)

Hence, (a + 2b) (3a + b) - (a + b)(a + 2b) + (a + 2b)2 = (a + 2b) (3a + 2b)

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