rút gọn b b = ( 2x/ 2x ² – 5x + 3 – 5/ 2x – 3 ) : ( 3+ 2/ 1-x ) ( ai có avatar anime đẹp tôi cho hay nhất )

Đáp án: b = 1/3 – 2x

Giải thích các bước giải:

b = (2x/ 2x ² – 5x + 3 – 5/ 2x – 3) : (3+ 2/ 1-x)

b = [2x/(x-1) . (2x – 3) – 5/2x – 3] : [3.(1-x) + 2/1-x]

b = 2x – 5 . (x – 1)/ (x – 1) . (2x – 3) . 1 – x/ 5 – 3x

b = [-3x + 5/(x – 1) . (2x – 3)] . (x – 1/3x – 5)

b = -1/2x – 3 = 1/3 – 2x

b = 1/3 – 2x

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