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What is the difference in the roots of the equation x^2-10 x+9=0 ?

Options

  1. A2
  2. B3
  3. C5
  4. D8

Correct answer

D. 8

Step-by-step solution

Sum of roots + =10 Product of roots =9 aligned - & = ( + )^2-4 & = (10)^2-4 9 & = 100-36 = 64 - & =8 aligned Difference of roots =8 .

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