## Algebra and Trigonometry 10th Edition

$(12x-1)(x-1)$
Use $-13x=-12x-x$ $12x^2-13x+1=12x^2-12x-x+1=(12x)x+(12x)(-1)+(-1)x+(-1)(-1)=12x(x-1)+(-1)(x-1)=(12x-1)(x-1)$