Solve

pt, dicembre 1994

Solve[4-x^2==0,x]

Solve[4-x^2==0,x] [[1]]

x^2 /. Solve[4-x^2==0,x] [[1]]

Solve[{x1 + x2 == 1,
      2 x1 - x2== -5},{x1,x2}] [[1]] //N

Solve[{x1 + x2 == a,
      c x1 - x2== b},{x1,x2}] [[1]]

Solve su matrici

m={{1-z1,2,3},{4,z2,6},{-1,-2,9 z3}}; MatrixForm[m]

v1={{1},{2},{3}}; MatrixForm[v1]

v2={{1,2,3}}; MatrixForm[v2]

v3={1,2,3}; MatrixForm[v3]

MatrixForm[m.v1]

MatrixForm[m.v2]

MatrixForm[m.v3]

Solve[m.v3==0,{z1,z2,z3}][[1]]