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Ответ

Ответ дан
25hjoerf10

0,4(х² + 7х) = 0,3(5 - 2х²)

0,4х² + 2,8х = 1,5 - 0,6х²

0,4х² + 0,6х² + 2,8х - 1,5 = 0

х² + 2,8х - 1,5 = 0 - данное уравнение является приведённым, т.к. первый коэффициент равен 1.


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