x^2-(m^2+3)x+1/2(m^2+2)=0
x1+x2=m^2+3
x1*x2=1/2(m^2+2)
x1^2+x2^2-x1x2=17/2
(x1+x2)^2-3x1x2=17/2
(m^2+3)^2-3*1/2(m^2+2)=17/2
2m^4+9m^2-5=0
(2m^2-1)(m^2+5)=0
m=√2,m=-√2
x^2-(m^2+3)x+1/2(m^2+2)=0
x1+x2=m^2+3
x1*x2=1/2(m^2+2)
x1^2+x2^2-x1x2=17/2
(x1+x2)^2-3x1x2=17/2
(m^2+3)^2-3*1/2(m^2+2)=17/2
2m^4+9m^2-5=0
(2m^2-1)(m^2+5)=0
m=√2,m=-√2