Предмет: Алгебра, автор: Vasilinka3108

Помогите пожалуйста решить уравнения:2х(во второй степени )+4х=0

Ответы

Автор ответа: ShirokovP
0
2x^2 + 4x = 0 
неполное квадратное уравнение 
выносим за скобки  2 и икс
2x (x + 2) = 0 
x = 0 
x + 2 = 0 ==> x = - 2 

# 2 
3x^2 - 7 x = 0 
x * (3x - 7) = 0 
x = 0 ;
3x - 7 = 0 ==> 3x = 7 ==> x = 7/3

Автор ответа: 89500
0
2x^2+4x=0\ 2x(x+2)=0\ x_1=0,,, x_2=-2
3x^2-7x=0\ 3x(x-frac73x)=0\ x_1=0,,, x_2=frac73
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