Why is equation set can't solve in Mathematica?

*To*: mathgroup at smc.vnet.net*Subject*: [mg99699] Why is equation set can't solve in Mathematica?*From*: Weber <a.pengwang at gmail.com>*Date*: Mon, 11 May 2009 06:26:41 -0400 (EDT)

Hi, all. This problem is annoying This: Solve[{yx13b == (-dg sxa yx13a + Sqrt[-dg dx1 sxa^2 yx13a + dg px013a sxa^2 yx13a - dg hxa sxa^2 yx13a^2 - dg sxa vx13a yx13a^2])/(dg sxa), yx13b == (-dx3 sxb + px013b sxb - 2 dg sxb yx13a - Sqrt[ 4 dg sxb (-dg sxb - hxb sxb - vx13b) yx13a^2 + (-dx3 sxb + px013b sxb - 2 dg sxb yx13a)^2])/( 2 (dg sxb + hxb sxb + vx13b))}, {yx13a, yx13b}] can't solve. Why?