I am a starter of the maple, now i have a problem of the equation of convert. the equation is like that: D(x1):=a1*fx+a2*gx-alpha*Ab; need a commend to convert equation gx:=...... but i don't know which commend can i apply in the Maple?

i need to solve the equation in method in least square; i have one equation e.g.f(x)=a*x^2-b*x-c, but i need use it two times in one equation,like g(x)=f(x1)-f(x). f(x1) put the value x1 in equation f(x),the behind is not change.so the equation like this : a*x1^2-b*x1-c-a*x^2-b*x-c if i input the equation g(x):=f(x)-f(x)the input the value a,b,c.got the 0. it's not my need. who can tell me how to solve the problem?

I have to solve the nonlinear equation, i give the all indication, but the system also give the error to me. who can help me to solve this problem? my equation is : a[1]:=2:b[1]:=0.01:a[2]:=1:b[2]:=0.01: a[0]:=1:b[0]:=0.01:a[3]:=1:b[3]:=0.01:v:=0.2: RF:=diff(x[1](t),t)=a[0]+a[1]*x[1]+a[2]/(v-x[1])+a[3]*x[2]/(x[1]*(v-x[1])),diff(x[2](t),t)=b[0]+b[1]*x[1]+b[2]/(v+x[1])+b[3]*x[2]/(x[1]*(v-x[1])); > ic:=x[1](0)=5,D(x[1])(0)=0,x[2](0)=1,D(x[2])(0)=0;x[1]*0.2=x[2]; > dsolve({RF,ic},x[1](t),x[2](t),type=numeric); Error, (in dsolve/numeric/process_input) received more than one indication of the dependent vars [x[1](t), x[2](t)]