phuong trinh` lop ' 8 cac' ban oi !!!!!?

a) 2x (x-3) + 5 (x-3) = 0

b) ( x^2 - 4 ) + ( x-2 ) (3-2x) =0

c) x^3 - 3x^2 + 3x - 1 = 0

d) x(2x- 7) - 4x + 14 = 0

e) (2x-5 )^2 - ( x+2)^2 = 0

f) x^2 - x - (3x - 3) = 0

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