Question

сократите дробь
 
   9х²+ 6х + 1
  _________
      9х² -1

Answer 1

$\frac{9x^2+6x+1}{9x^2-1}= \frac{(3x)^2+2\cdot3x\cdot1+1^2}{(3x)^2-1^2}= \frac{(3x+1)^2}{(3x-1)(3x+1)}= \frac{3x+1}{3x-1}$

Answer 2

(3х+1)^2 3х+1
_______ =____
(3х-1)(3х+1) 3х-1