14-09-2016
Mathematics

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how many solutions will the following equation have? 25=20x-4x^2

Respuesta :

14-09-2016

Hello,

[tex]4x^2-20x+25=0\\ \Delta=20^2-4*4*25=0\\ x= \dfrac{20}{8} = \dfrac{5}{2} \\ 4x^2-20x+25=0\\ (2x-5)^2=0\\ \mbox{One solution (double) Sol=\{ \dfrac{5}{2} \}} [/tex]

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