W Rut gen bien this. ay (5x-2y) (x²- xy+1) + xy (7x-2y) (x-1)(x+1) (242) – (x²-1) (x+2) - G (x+y) (x² -xy xy ²) + (x − y) (x² + xy + y²) biết: ✓ tim × a) (12x-5) (4x-1) + (3x-7)(1-16x) = 81 b) (x+1)(x²x+1)x(x²-3)= 4 9 (x-3) (x²+3x+9) + x (5-x)=6x d₁ (x-2)(x+3)-(x+4)(x-7) = 5-x Ơi tìm 3 ...