Factorise : a 2 +4ab+3b 2
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a²+4ab+3b²
=a²+3ab+ab+3b² (by splitting middle term)
=a(a+3b)+b(a+3b)
=(a+b)(a+3b)
=a²+3ab+ab+3b² (by splitting middle term)
=a(a+3b)+b(a+3b)
=(a+b)(a+3b)
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Step-by-step explanation:
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