<PRE><B>Question 198506</B>
Can you please help me solve this equation?
 I forget the process for this type and there are no examples in my textbook. Thank you.
:
21x^2 + 14x = 0
:
Factor out 7x
7x(3x + 2) = 0
Two solutions
7x = 0
x = 0
and
3x = -2
x = {{{-2/3}}}
:
:
Check solution using x = {{{-2/3}}}
21({{{-2/3}}})^2 + 14({{{-2/3}}}) = 0
21({{{4/9}}}) + 14({{{-2/3}}}) = 0
{{{84/9}}}) + ({{{-28/3}}}) = 0
{{{84/9}}}) + ({{{-84/9}}}) = 0</PRE>