Bài 2:a) 2(x-1)=3(3+x)+1b) 3(x-1)=3(3+x)+1c) 3(5x-1)-2(x-3)=7x-9d) (3x+5)-(2x-1)=4x-2Bài 3:a) 3-4x(25-2x)=8x^2+x-300b) 2x(x+3)-5x=x(x-2)+4c) (2x-1)^2+5=(2x+3)(2x-3)-6x
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