Question

已知X等于根号三加根号二，Y等于根号三减根号二，求X的二次方减二XY加Y二次方的值

Answer 1

X的二次方减二XY加Y二次方=x^2-xy+y^2=(x-y)^2+xy=12+1=13

Answer 2

x^2 - 2xy + y^2 x^2 X的二次方= (x - y)^2= [(√3 +√2) - (√3 -√2)]^2= (2√2)^2= 8

Answer 3

8