ساده شده عبارت ${{\mathop {4x}\nolimits^2 - 9\mathop y\nolimits^2 } \over {\mathop {2x}\nolimits^2 + 3xy}} \div {{\mathop x\nolimits^2 + x - 2} \over {\mathop x\nolimits^3 - x}}$ کدام است؟
1 )
${{(2x - 3y)(x - 1)} \over {x - 2}}$
2 )
${{(2x + 3y)(x + 1)} \over {x - 2}}$
${{(2x - 3y)(x + 1)} \over {x + 2}}$
4 )
${{(2x + 3y)(x - 1)} \over {x - 2}}$