Answers edited by 冠廷 李.

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• How do you simplify #(x+2) /(4x^2 - 14x + 6)-(x+4)/(x^2 + x -12)#?
  
• Question #07b93
  
• How do you solve #-8<=(3x+17)/2<3# and write the answer in interval notation?
  
• What is the slope of the line that passes through #(1,7), (10,1)#?
  
• Question #0d91d
  
• How do you find the roots, real and imaginary, of #y=x^2 - 5/2x + 1/2 # using the quadratic formula?