Question 381285
Let {{{u=3x+5}}}
{{{8u^2+2u-1=0}}}
{{{(4u-1)(2u+1)=0}}}
Two solutions:
{{{4u-1=0}}}
{{{4u=1}}}
{{{u=1/4}}}
{{{3x+5=1/4}}}
{{{12x+20=1}}}
{{{12x=19}}}
{{{highlight(x=19/12)}}}
.
.
.
{{{2u+1=0}}}
{{{2u=-1}}}
{{{u=-1/2}}}
{{{3x+5=-1/2}}}
{{{6x+10=-1}}}
{{{6x=11}}}
{{{highlight(x=11/6)}}}
.
.