解答题已知x1,x2是方程2x^2-8x+5=0的两根,不解方程,求下列各式的值x1^2x2+x1x2^2
x1+x2=4
x1*x2=5/2
x1^2x2+x1x2^2
=x1*x2*(x1+x2)
=10