## Algebra and Trigonometry 10th Edition

Expression : $x^{2} + x - 2$ $x^{2} + x - 2 = x^{2} -x + 2x - 2$ (split middle term) $x^{2} -x + 2x - 2 = x(x-1) +2(x-1)$ Common factor = (x-1) $x(x-1) +2(x-1) = (x-1)(x+2)$