one of the value of x in log(x+7)(36x+9)=2 is?

• a^m=x then m = log(a)(x) here 'a' is the base.
  
  log(x+7)(36x+9)=2 here m=2, a = x+7, x =36x+9
  
  (x+7)^2=36x+9
  
  x^2-22x+44=0 ....
  
  when x=2 will satisfy the equation..
  so, 2 is the answer.
• 8 years agoHelpfull: Yes(5) No(3)
• ans should be 2 and 20 both
  36x+9= (x+7)^2
  36x+9= x^2+14x+49
  x^2-22x-40=0
  x=2,20
• 8 years agoHelpfull: Yes(4) No(1)
• x=2
  (by hit & trial)
• 8 years agoHelpfull: Yes(1) No(0)
• ans should be 20
  coz log(20+7)(36*20+9)
  log27(729)
  log27(27^2)
  2
  so the x sholud be 20.
• 8 years agoHelpfull: Yes(1) No(1)
• 2
  log9 81=2
• 8 years agoHelpfull: Yes(0) No(0)
• the answer is b as it is mentioning that s arrival is 20 days before anil and the day when anil went was mentioned
• 8 years agoHelpfull: Yes(0) No(1)