Question 173705
{{{9x^2-4=0}}}we have difference of squares
:
{{{(3x+2)(3x-2)=0}}}
:
3x+2=0--->3x=-2--->x=-2/3
:
3x-2=0--->3x=2---->x=2/3
:
{{{system(x=-2/3,x=2/3)}}}