Answers edited by Laura

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• How do you solve #Log(x+2)+log(x-1)=1#?
  
• What is the equation of the line normal to # f(x)=-x/sqrt((x-5)(x+2)# at # x=6#?
  
• How do you solve #log(2x) - log(2^x) = log(x^2) - log(x)#?
  
• How do you find the axis of symmetry, and the maximum or minimum value of the function #y = x^2+ 4x + 3#?