Предмет: Алгебра, автор: Dionysusss

Помогите пожалуйста решить уравнения:
1.(5x-3)x^{2} -2x(5x-3)+3(3-5x)=0;
2.(x+3)( x^{2} +2x-1)(x-1)=35.

Ответы

Автор ответа: ВладимирБ
0
Решение смотри в приложении
Приложения:
Автор ответа: sedinalana
0
1
(5x-3)x²-2x(5x-3)-3(5x-3)=0
(5x-3)(x²-2x-3)=0
5x-3=0⇒5x=3⇒x=0,6
x²-2x-3=0
x1+x2=2 U x1*x2=-3⇒x=-1 U x=3
Ответ x={-1;0,6;3}
2
(x²+2x-1)(x²-x+3x-3)=35
(x²+2x-1)(x²+2x-3)-35=0
x²+2x-1=a
a(a-2)-35=0
a²-2a-35=0
a1+a2=2 U a1*a2=-35
a1=-5⇒x²+2x-1=-5
x²+2x+4=0
D=4-16=-12<0 нет решения
a2=7⇒x²+2x-1=7
x²+2x-8=0
x1+x2=-2 U x1*x2=-8
x1=-4 U x2=2
Приложения:
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