samiju samiju
  • 19-02-2021
  • Mathematics
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Does anyone know how he got from step one to step two????

Does anyone know how he got from step one to step two class=

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hensnx hensnx
  • 19-02-2021
You just have to apply the resolution formula, a is your first term, b the secon and c the third (+9) remember to NOT write the x when you’re solving the equation
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