Question 112557
{{{4z^2=9}}}
:
subtract 9 from both sides and you have the difference of squares:
{{{4z^2 - 9 = 0}}}
:
Which factors to:
(2z + 3)(2z - 3) = 0
:
2z = -3
z = {{{-3/2}}}
and
2z = +3
z = {{{3/2}}}