A) (2X + 3)(X - 4) + (X - 5)(X - 2) = (3X - 5)(X - 4); B) (8X - 3)(3X + 2) - (4X + 7)(X + 4) = (2X + 1)(5X - 1); C) 2X2 + 3(X - 1)(X + 1) = 5X(X + 1); D) (8 - 5X)((X + 2) + 4(X - 2)(X + 1) + (X - 2)(X + 2); E) 4(X - 1)( X + 5) - (X +2)(X + 5) = 3(X - 1)(...

Bài 11. Tìm x, biết:

a) (2x + 3)(x - 4) + (x - 5)(x - 2) = (3x - 5)(x - 4);

b) (8x - 3)(3x + 2) - (4x + 7)(x + 4) = (2x + 1)(5x - 1);

c) 2x

²

+ 3(x - 1)(x + 1) = 5x(x + 1);

d) (8 - 5x)((x + 2) + 4(x - 2)(x + 1) + (x - 2)(x + 2);

e) 4(x - 1)( x + 5) - (x +2)(x + 5) = 3(x - 1)(x + 2).