Phân tích dthuc -> nt ( 3 – 2x ) ( 5 – x) – 2 ( x – 5 ) ^2

2 bình luận về “Phân tích dthuc -> nt ( 3 – 2x ) ( 5 – x) – 2 ( x – 5 ) ^2”

1. (3 – 2x)(5 – x) – 2(x – 5)^2

   = (2x – 3)(x – 5) – 2(x – 5)(x – 5)

   = (x – 5)[2x – 3 – 2(x – 5)]

   = (x – 5)[2x – 3 – 2x + 10]

   = (x – 5)7

    

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2. Giải đáp:

   (3 – 2x)(5 – x) – 2(x – 5)^2

   = (2x – 3)(x – 5) – 2(x – 5)(x – 5)

   = (x – 5)[2x – 3 – 2(x – 5)]

   = (x – 5)(2x – 3 – 2x + 10)

   = 7(x – 5)

   #Na

    

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