4x.(3x - 1) - 2.(3x + 1) - (x + 3) = 0
12x2 - 4x - 6x - 2 - x - 3 = 0
TH1:
12x2 -11x - 5 = 0
x =
x = 5/4
TH2:
x = -1/3
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x = 5/4 ; x = -1/3
Haraku Mio0 Trả lời · 08:30 12/06 Gia Kiet Hoang ...0 Trả lời · 08:33 12/06 Sư Tử0 Trả lời · 08:34 12/06
