帮我化简一下这个式子[(x^2+3x+9)/(x^2-27)]+[6x/(9x-x^2)]-[(x-1)/(6+2x)](√18-4√1/2+1/√2-√3)/(√3/3)
问题描述:
帮我化简一下这个式子
[(x^2+3x+9)/(x^2-27)]+[6x/(9x-x^2)]-[(x-1)/(6+2x)]
(√18-4√1/2+1/√2-√3)/(√3/3)
答
=[(x+3)^2/(x^2-27)+6x/x(3-x)(3+x)]-[(x-1)/2(3+x)]
再通分化简.
感觉(x^2-27)应该是x^2-9