Предмет: Алгебра, автор: Kaf7456

Срочно помогите пожалуйста . Какое из данных уравнений является квадратным уравнением: А.x^4-2,5x+7=0; B. 3x^2+0,1x-5=0;C.3,2x+x^3=0;D.6x^2+0,1x^3+13=0? 2)приведите уравнение(х-5)(2х+3)-(х+4)(4-х)=2х+5 к виду ax^2+bx+c=0:A.3x^2+5x-26=0;B.x^2-9x-12=0 D.x^2-3x-12=0

Ответы

Автор ответа: bett18

Вот, но я во втором точно не уверена)

1)В

2)а

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