Question

упростите выражение x/x-3-2/x+3:4x²+4x+24/x²-9

Answer 1

[x/(x-3) - 2/(x+3)] : [(4x²+4x+24)/(x² - 9)] = 
   = [x(x+3) -2(x-3)]/(x² - 9)  : [(4x²+4x+24)/(x² - 9)] =
   = (x²+x+6)/[4((x²+x+6)] = 1/4