raku raku
  • 18-03-2018
  • Mathematics
contestada

can someone please explain me why it was switched from - to +

can someone please explain me why it was switched from to class=

Respuesta :

radhikasehgal1p5sbzw
radhikasehgal1p5sbzw radhikasehgal1p5sbzw
  • 18-03-2018
that's because the denominator is negative and when you simplify it then the denominator gets cancelled and becomes -1 therefore the sign moves to the numerator and it becomes negative
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