Question

2√3+2分之 √5-10√0.04

Answer 1

如果题目是[√5-(10√0.04)]/(2√3+2)

则[√5-(10√0.04)]/(2√3+2)

=(√5-10×0.2)/[2(√3+1)]

=(√5-2)/[2(√3+1)]

=[(√5-2)(√3-1)]/[2(√3+1)(√3-1)]

=[√15-2√3-√5+2]/4

如果题目是√(5-10√0.04)/(2√3+2)

则√(5-10√0.04)/(2√3+2)

=√(5-10×0.2)/[2(√3+1)]

=√(5-2)/[2(√3+1)]

=√3/[2(√3+1)]

=[√3(√3-1)]/[2(√3+1)(√3-1)]

=(3-√3)/4