Pregunta: Add or subtract. Simplify if possible.x2-17x2-26x+153-x-17x-9x2-17x2-26x+153-x-17x-9=◻

Factor ${\mathrm{x}}^2-26\mathrm{x}+153$ using the AC method.

$\frac{{\mathrm{x}}^2-17}{(\mathrm{x}-17)(\mathrm{x}-9)}-\frac{\mathrm{x}-17}{\mathrm{x}-9}$

To write $-\frac{\mathrm{x}-17}{\mathrm{x}-9}$ as a fraction with a common denominator, multiply by $\frac{\mathrm{x}-17}{\mathrm{x}-17}$ .