回答:
#COLOR(蓝色)(X = 4)的颜色(白色)( “XX”)orcolor(白色)( “XX”)的颜色(蓝色)(X = -2)#
说明:
特定
#COLOR(白色)( “XXX”)2 /(X + 6)+(2×)/(X + 4)=(3×)/(X + 6)#
#rArr颜色(白色)(“XX”)(2x)/(x + 4)=(3x-2)/(x + 6)#
交叉相乘。
#color(白色)(“XXX”)(2x)xx(x + 6)=(3x-2)xx(x + 4)#
#rArrcolor(白色)( “XX”)2×^ 2 + 12×3×= ^ 2 + 10X-8#
#rArrcolor(白色)( “XX”)的x ^ 2-2x-8 = 0#
#rArrcolor(白色)( “XX”)(X-4)(X + 2)= 0#
#rArr {:(x-4 = 0,颜色(白色)(“XX”)或颜色(白色)(“XX”),x + 2 = 0),(rarrx = 4,,rarrx = -2):} #