Respuesta :

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ax^2+bx+c=0




disctirminant =b^2-4ax




x1,2=-b+- square root of disctirminant /2a



a=1 b=-7 c=1



disctirminant =(-7)^2-4.1.1




disctirminant =49-4=45



x1=-(-7)+square root of 45/2.1


x1=7+3 square root of 5/2


x2=-(-7)-square root of 45/2.1


x2=7-3 square root of 5/2