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12x^2 + 60x + 75 = ?  A. (2x + 5)(6x + 5)  B. (3x + 5)^2  C. 3(2x + 5)^2  D. none of these

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12x2 + 60x + 75 = ? 

A. (2x + 5)(6x + 5) 

B. (3x + 5)2 

C. 3(2x + 5)2 

D. none of these

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1 Answer

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Best answer

12x2 + 60x + 75 

By using Splitting the middle term 

12 x2 + 60x + 75 

= 3(4 x2 + (10 + 10)x + 25) 

= 3(2x(2x + 5) + 5(2x + 5)) 

= 3(2x + 5)(2x + 5)

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