Question 1065097
{{{ z^2 = 2.25 }}}
Multiply both sides by {{{ 4 }}}
{{{ 4*z^2 = 9 }}}
{{{ z^2 = 9/4 }}}
Take the square root of both sides
{{{ z = 3/2 }}}
and also
{{{ z = -3/2 }}}