Предмет: Алгебра, автор: mrpayne43

помогите с уравнениями!!!!
ДАЮ МАКСИУМ БАЛЛОВ

Приложения:

Ответы

Автор ответа: sarmukanovbahtiar
0

Объяснение:

.........................

Приложения:
Автор ответа: NNNLLL54
0

Ответ:

A)\ \ x^3-5x^2-x+5=0\\\\x^2(x-5)-(x-5)=0\\\\(x-5)(x^2-1)=0\\\\(x-5)(x-1)(x+1)=0\\\\x_1=5\ ,\ x_2=1\ ,\ x_3=-1

Б)

x^4-2x^2-8=0\\\\t=x^2\geq 0\ \ ,\ \ \ t^2-2t-8=0\ \ ,\ \ t_1=-2\ ,\ t_2=4\ \ ,\\\\x^2=4\ \ \to \ \ \ x_1=-2\ ,\ x_2=2

B)\ \ (x^2-5x)(x^2-5x+10)+24=0\\\\(x^2-5x)(\, (x^2-5x)+10\ )+24=0\\\\(x^2-5x)(x^2-5x)+10(x^2-5x)+24=0\\\\\underbrace{(x^2-5x)^2+10(x^2-5x)+25}-25+24=0\\\\\\\Big((x^2-5x)+5\Big)^2-1=0\\\\\Big((x^2-5x)+5-1\Big)\Big((x^2-5x+5+1\Big)=0\\\\(x^2-5x+4)(x^2-5x+6)=0\\\\(x-1)(x-4)(x-2)(x-3)=0\\\\x_1=1\ ,\ x_2=4\ ,\ x_3=2\ ,\ x_4=3

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