Question 152822
{{{16a^4-9a^2=a^2(16a^2-9)= 0}}}
First solution:
{{{a^2=0}}}
{{{a=0}}}
Second solution:
{{{16a^2-9= 0}}}
{{{16a^2=9}}}
{{{a^2=9/16}}}
{{{a=0 +- 9/16}}}
Three roots : [{{{0}}},{{{-9/16}}},{{{9/16}}}]
{{{ graph( 300, 300, -2, 2, -10, 10, 16x^4-9x^2) }}}