Question 1087188
{{{(4sqrt( 3)-3)(-5sqrt( 3)+3) }}}

={{{(4sqrt(3)(-5sqrt(3)))+3*4sqrt(3)-3(-5sqrt(3))-3*3 }}}

={{{(4*(-5) 3)+12sqrt( 3)+15sqrt( 3)-9 }}}

={{{-60+27sqrt( 3)-9 }}}

={{{27sqrt( 3)-69 }}}...simplified

approximately {{{-22.24}}}