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Question

Factorisation of the expression 4m2+12m+9 results in:

A
(2m+3)(2m+3)
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B
(3m+2)(3m+2)
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C
(3m+2)(3m2)
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D
(2m+3)(2m3)
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Solution

The correct option is B (2m+3)(2m+3)
4m2+12m+9

=(2m)2+2(2m)(3)+(3)2

=(2m+3)2 ...[(a+b)2=a2+2ab+b2]

=(2m+3)(2m+3)

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