help plot the inequality

Is there a way i can create a inequality for this function

syms a b

%b=k2 a =k1

X = ((11+b)*(121+a)-(a+a*b+110*b+210))/(11+b);

simplify(X)

Z = ((X*(a+a*b+110*b+210)-(11*a+100)*(11+b))/X)

simplifyFraction(Z);

simplify(Z)

[madhan ravi]

what inequality do you want to imply?

[CESAR LOPEZ]

im sorry,

make x and z greather than zero

Answer 1

[Star Strider]

Straightforward:

syms a b X Z 
assume(X > 0)
assume(Z > 0)

It does not appear to have any effect on the rest of your posted code.