[tex]Descompuneti~in ~factori:\\ y^2-3y+2;\\ a^2y^2-5a^2y+6a^2;\\ x^2y-yx-2x+2;\\ a^2+a^2b-3a-3ab;\\ yx^2-6xy+16y;\\ yx^2+5xy+4y;\\ x^4-11x^2+30;\\ 5x+10;\\ 16x^2-9;\\ x^2-10x+25;\\ (3x+1)(x-2)-(3x+1)(x+2);\\ (x-y)^2-16x^2+8x-1;\\ (x+3)^2-(x-5)^2.[/tex]