化简:(16-x²)/(x²+8x+16)÷(x-4)/(2x+8)
问题描述:
化简:(16-x²)/(x²+8x+16)÷(x-4)/(2x+8)
答
=(4+x)(4-x)/(x+4)²÷(x-4)/(2(x+4))
=(4-x)/(x+4)*2(x+4)/(x-4)
=-2