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For specific positive numbers m and n, the quadratics 16x^2+56x+36 and (mx+n)^2 differ only in their constant term. What is mn?

 Jul 6, 2021
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16x^2  +  56x  +  36

Let  m = 4,  n  =  7

Note :  56  =   2 (4)(7)

(4x + 7)^2   =  (4x + 7) ( 4x + 7)  =  16x^2 + 56x  +  49

 

mn   =  4 * 7    = 28

 

cool cool cool

 Jul 6, 2021

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