HP 49G User Manual page 62

3
x – x –
SOLVEVX(X^3-X-9)
{X=2.2400}
SUBST
2
x + 3x
SUBST(X^2+3*X+7,X=Z+1)
EXPAND(ANS(1))
Z^2+5*Z+11
SUBTMOD
1-62
9
+ 7
Command Reference: Part A (1.1)