已知X等于根号3减1分之2,求X平方减2X加2的值

x²-2x+2
=x（x-2）+2
=（根号3-1/2）（根号3-1/2-2）+2
=（根号3-1/2）（根号3-5/2）+2
=3-5根号3/2-根号3/2+5/4+2
3-6根号3/2+13/4
=3-3根号3+13/4
=25/4-3根号3