一道二次根式运算题..
问题描述:
一道二次根式运算题..
(7- 4倍根号3)^2006 * (-7- 4倍根号3)^2007
答
=-(7- 4√3)^2006 * (7+4√3)^2007
=-[(7- 4√3)(7+4√3)]^2006*(7+4√3)
=-(49-48)^2006*(7+4√3)
=-7- 4√3