Possible solutions: x1=−11, x2=−4, x3=0 and x1=−1, x2=0 and x3=1. Possible solutions: x1=−23, x2=23, x3=0 and x1=49, \(...Possible solutions: x1=−11, x2=−4, x3=0 and x1=−1, x2=0 and x3=1. Possible solutions: x1=−23, x2=23, x3=0 and x1=49, x2=−19, x3=1 Possible solutions: x1=1, x2=0, x3=1, x4=0 and x1=−2, x2=1, x3=−3, x4=2 Possible solutions: x1=3, x2=−3, x3=0, x4=0 and x1=0, x2=−5, x3=−1, x4=1