annaguerette
annaguerette annaguerette
  • 03-12-2020
  • Mathematics
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(see image for question)

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Respuesta :

narvekarrituja
narvekarrituja narvekarrituja
  • 03-12-2020

Answer:

Hans has done a mistake in the second step.

The correct answer is:

5x^2+13x-6=0

5x^2+15x-2x-6x=0 - 5. -6=-30 -30=15. -2

5x(1+3x)-2x(1+3x)=0

(5x-2x)(1+3x)=0

5-2x=0 1+3x=0

x=5/2 x=-1/3

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