Answers edited by Daksh S.

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• How do you find the roots, real and imaginary, of #y= x^2 + 8x -9- (-x-1)^2 # using the quadratic formula?
  
• How do you convert 87.5% as a fraction and a decimal?
  
• Question #cca9c
  
• Question #d96aa
  
• How to simplify #(1.5times10^-3) divide (1.6times10^-6)# in scientific notation?