Предмет: Математика, автор: zhuldyzai98

решите уравнение6х(0,5+3х)-15х^2=0 помогите пожалуйста на ее замене сижу

Ответы

Автор ответа: PopCop312

$6x(0,5+3x)-15x^2=0\ 3x+128x^2-15x^2=0\ 3x+3x^2=0\ 3x(1+x)=0\ [[ {{x=0} atop {x=-1}}\ Answer: 0;-1$

Автор ответа: ksot2008

6х(0,5+3х)-15х^2=0

3x+18x^2-15x^2=0

3x^2+3x=0

3x(х+1)=0

3х=0 или х+1=0

х1=0 х2=-1

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