D=16+64=80
x1= (4-√80)/2= 2-√20
x2= (4+√80)/2= 2+√20
решение на фото/////////////
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D=16+64=80
x1= (4-√80)/2= 2-√20
x2= (4+√80)/2= 2+√20
решение на фото/////////////