请问如何用卡西欧ClassPad300图形计算器解二元二次方程组，如：x^2-y=1,x+5y=9,谢谢！

请问。。。这个方程有解么。。。
好不容易从CASIO CP330说明书上找到了。。。
http://eblog.cersp.com/userlog5/78304/archives/2007/273355.shtml
u solve
Function: Returns the solution of an equation or inequality.
Syntax: solve (Exp/Eq/Ineq [,variable] [ ) ]
• For this syntax, “Ineq” also includes the ≠ operator.
• “x” is the default when you omit “[,variable]”.
solve (Exp/Eq,variable[, value, lower limit, upper limit] [ ) ]
• This syntax does not support “Ineq”, but the ≠ operator is supported.
• “value” is an initially estimated value.
• This command is valid only for equations and ≠ expressions when “value”
and the items following it are included. In that case, this command returns
an approximate value.
• A true value is returned when you omit “value” and the items following it.
When, howev