code: function() {
              var m = this.m,
                  a = m.a,
                  b = m.b,
                  c = m.c,
                  d = m.d,
                  e = m.e,
                  f = m.f,
                  k, aa, bb, cc, dd, ee, ff;
              k = a * d - b * c;
              aa = d / k;
              bb = -b / k;
              cc = -c / k;
              dd = a / k;
              ee = (c * f - e * d) / k;
              ff = (b * e - a * f) / k;
              return new Matrix(aa, bb, cc, dd, ee, ff);
          }
docs: 获得反转矩阵
  
  这是我解方程算出来的