(3x+5) / (x-3) = (15x+1 )/ (5x +2) nhanh ạ

2 bình luận về “(3x+5) / (x-3) = (15x+1 )/ (5x +2) nhanh ạ”

1. (3x+5)/(x-3)=(15x+1)/(5x+2)

   =>(3x+5).(5x+2)=(15x+1).(x-3)

   =>3x.5x+3x.2+5.5x+5.2=15x.x-15x.3+x-3

   =>15x^2+6x+25x+10=15x^2-45x+x-3

   =>15x^2+31x+10=15x^2-44x-3

   =>15x^2-15x^2+31x+44x=-3-10

   =>75x=-13

   =>x=-13/75

   Vậy x=-13/75

    

   Trả lời
2. (3x+ 5) /( x-3) = (15x + 1) /( 5x + 2)

   <=>(3x+ 5).(5x+2)= (15x + 1 ). (x-3)

   <=>15x^2 + 31x +10 = 15x^2 -44x -3

   <=>15x^2 -15x^2 +31x + 44x = -10 -3

   <=>75x=-13

   <=>x=-13/75

    

   Trả lời